Third Declension Nouns: -is

(A) Plural genitive in -um (sg. abl. -e only) (A1) Increasing homo -inis m. (man)& actio -onis f. (action)& neuter nouns: onus -eris n. (burden) (A2) Non-increasing canis -is m.f. (dog) (B) Plural genitive in -ium(sg. abl. -i/-e) (B1) Non-increasing avis -is f. (bird)& neuter nouns: mare -is n. (sea) (B2) Increasing single syllable -- lis -itis f. (dispute) consonant endings -- urbs -bis f. (city) neuter nouns: in -al, -ar, -e -- animal -is n. (animal) (C) Irregulars febris, -is f. (fever) bos, -ovis, m. (cow) * * * (A) Plural genitive in -um(sg. abl. -e only) [return to top] (A1) Increasing homo -inis m. (man) actio -onis f. (action) onus -eris n. (burden) *** -inis adsuetudo -inis f. custom/habit aegritudo -inis f. sickness/sorrow albedo -inis f. whiteness assuetudo -inis f. custom/habit bufo -onis m. toad caligo -inis f. thick air/mist/vapour/fog consuetudo -inis f. custom/habit draco -onis m. serpent/dragon dulcedo -inis m. sweetness/pleasantness/charm gluten -inis f. glue homo -inis m. man imāgo -inis f. representation/likeness/copy latro -onis m. bandit/brigand/chessman leo -onis m. lion lumen -inis m. light magnitudo -inis f. greatness/large quantity nemo -inis f. no one,/nobody ordo -inis m. row/line/series/order/rank origo -inis f. begining/source/birth/origin pulchritudo -inis f. beauty/excellence pavo -onis m.f. peacock praeco -onis m. crier/herald praedo -onis m. robber/pirate salomon -onis m. Solomon sanguis -inis m. blood/bloodshed/descendant sermo -onis m. conversation/talk/discourse/rumour/language tiro -onis m. recruit, beginner virgo -inis f. maid/virgin/young woman/girl *** -onis actio -onis f. action appellatio -onis f. address/name/title benedictio -onis f. blessing circulatio -onis f. circulation coagulatio -onis f. coagulation cogitatio -onis f. thought/reflection/imagination cognitio -onis f. aquainted with/acquiring knowledge comes -itis m. companion commentatio -onis f. studying/meditation compositio -onis f. connecting/putting together comprehensio -onis f. comprehension/perception condicio -onis f. arrangement/condition/contract confusio -onis f. a mingling/mixing/blending coniunctio -onis f. union/connecting/conjunction consensio -onis f. agreement/concord constitutio -onis f. disposition/constitution/nature contentio -onis f. dispute,effort conventio -onis f. agreement corruptio -onis f. corruption creatio -onis f. creation/election defensio -onis f. defense descriptio -onis f. delineation/copy/representation/plan dicio -onis f. power/sway digestio -onis f. digestion/an enumeration dispositio -onis f. regular disposition/arrangement disputatio -onis f. argument dissensio -onis f. disagreement/conflict distillatio -onis m. distillation divisio -onis f. division editio -onis f. edition elevatio -onis f. elevation exceptio -onis f. exception, restriction excursio -onis f. raid/stepping forward(gesture) exercitatio -onis f. practice/exercise/experience fermentatio -onis f. fermentation festinatio -onis f. haste/hurry/despatch/speed fixatio -onis f. fixation/fixing generatio -onis f. generation gubernatio -onis f. direction/management/government incursio -onis f. attack/invasion indicatio -onis f. value inflammatio -onis f. kindling/firing intercessio -onis f. becoming surety interpretatio -onis m. explanation/exposition introductio -onis f. introduction inventio -onis f. faculty of invention/invention irrigatio -onis f. watering/irrigation latio -onis f. bringing/proposing/rendering of assistance lectio -onis f. a picking out/reading/perusal/selecting legatio -onis f. mission/embassy legio -onis f. legion monitio -onis f. admonition/warning navigatio -onis f. voyage obligatio -onis f. pledge oblivio -onis f. oblivion/forgetfulness observatio -onis f. investigation/watching obsidio -onis f. siege/blockade occasio -onis f. opportunity/convenient time offensio -onis f. stumbling block/misfortune operatio -onis f. operation opinio -onis f. opinion/belief/esteem/rumour oppugatio -onis f. attack/assault perfectio -onis f. finishing/completing/perfection portio -onis f. share/installment positio -onis f. situation preparatio -onis f. preparation privatio -onis f. privation/a taking away progressio -onis f. advancement/growth/increase proportio -onis f. proportion/part purgatio -onis f. cleansing/purgation purificatio -onis f. purification putrefactio -onis f. putrefaction ratio -onis m. reckoning/list/explanation/thought rebellio -onis f. revolt recognitio -onis m. review/investigation recuperatio -onis m. recovery regio -onis f. direction/boundary religio -onis f. reverence/awe/religion/superstition remissio -onis f. release/slackening/relaxation repercussio -onis f. echo/repercussion/reflection repetitio -onis f. repetition reprehensio -onis f. check/blame/repremand/refutation restauratio -onis f. restoration secessio -onis f. withdrawal/secession sectio -onis f. section separatio -onis f. separation solutio -onis f. solution/ loosing/relaxation/weakening sublimatio -onis f. sublimation suspicio -onis f. mistrust/suspicion traditio -onis f. surrender/giving up/delivering up transmutatio -onis f. transmutation *** -oris amator -oris m. lover/friend amor -oris m. love/desire arbor -oris f. tree ardor -oris m. burning heat auctor -oris m. originator/instigator/promoter/author calor -oris m. warmth/heat censor -oris m. censor clamor -oris m. shout/cry color -oris m. colour conditor -oris m. founder/author/composer creator -oris m. creator/father cruor -oris m. gore cunctator -oris m. loiterer defensor -oris m. defender dictātor -oris m. dictator dispensator -oris m. steward/treasurer dolor -oris m. pain/grief/resentment dominator -oris m. lord/ruler emptor -oris m. purchaser error -oris m. wandering/mistake/error explorator -oris m. patrol favor -oris m. favor/support/applause flos -oris m. flower/bloom fulgor -oris m. lightning/flash/brightess/splendour furor -oris m. frenzy/raving genitor -oris m. father/sire gubernator -oris m. steersman honor -oris m. honour/esteem/repute horror -oris m. shuddering/dread humor -oris m. liquid/fluid/moisture imperator -oris m. commander inventor -oris m. inventor/discoverer labor -oris m. toil lector -oris m. reader maeror -oris m. grief/sorrow mercator -oris m. trader/dealer odor -oris m. scent/smell/stench orator -oris m. orator/speaker/spokesman pabulator -oris m. forager pastor -oris m. shepherd pavor -oris m. dread pistor -oris m. miller,baker praedicator -oris m. eulogist pudor -oris m. sense of shame/modesty/propriety rumor -oris m. hearsay/rumour/public opinion scriptor -oris m. writer/author senator -oris m. senator soror -oris f. sister splendor -oris m. brightness stupor -oris m. astonishment tremor -oris m. trembling uxor -oris f. wife vapor -oris m. steam victor -oris m. conqueror *** -eris aer -eris m. air {m} aer -eris f. air/atmosphere/sky/mist/vapour aether -eris m. upper air/sky/heaven agger -eris m. mount/rampart carcer -eris m. prison cinis -eris m. ashes later -eris m. brick/tile mulier -eris f. woman pulvis -eris m. dust/power *** -atis acerbitas -atis f. harshness aequalitas -atis f. equality/likeness/similarity aequitas -atis f. uniformity/evenness/calmness aestas -atis f. summer aetas -atis f. age/period of life/time auctoritas -atis f. authority benignitas -atis m. kindness/liberality/bounty brevitas -atis f. shortness/smallness/brevity calamitas -atis f. disaster/defeat/failure charitas -atis f. love/charity civitas -atis f. citizenship/city difficultas -atis f. difficulty dignitas -atis f. worth/greatness/authority/reputation dualitas -atis f. duality egestas -atis f. need/destitution facultas -atis f. capability/skill/supply/resources hereditas -atis f. inheritance honestas -atis f. honourable reputation/integrity humanitas -atis f. mankind/humanity humiditas -atis f. humid/wet immortalitas -atis f. immortality latinitas -atis f. pure Latin style libertas -atis f. freedom maiestas -atis f. grandeur/sovereign power necessitas -atis f. compulsion/requirement optimas -atis f. of the best/noblest paucitas -atis f. small number/scarcity paupertas -atis f. poverty/moderate means pietas -atis f. devotion/sense of duty potestas -atis f. power/control/authority proprietas -atis f. property/peculiarity qualitas -atis f. property/nature/state/condition raritas -atis f. looseness of texture sanitas -atis f. health/soundness of body satietas -atis m. sufficiency/satiety societas -atis f. alliance/association/partnership subtilitas -atis m. fine/subtle/delicate summitas -atis m. top temeritas -atis f. chance/rashness/thoughtlessness tempestas -atis f. time/weather/storm trinitas -atis m. trinity unitas -atis f. unity/unit varietas -atis f. diversity/variety venustas -atis f. charm/beauty veritas -atis f. truth/truthfulness/reality/integrity vetustas -atis f. old age/antiquity *** -icis artifex -icis m. artist/artificer cervix -icis f. neck dux -ucis m. leader/guide/chief/head fax -acis f. torch/meteor (astr)/flame fire(fig) faux -ucis f. jaws/throat/defile/pass genetrix -icis f. mother grex -egis m. flock/herd/company gubernatrix -icis f. conductress/directress iudex -icis m. judge/critic mendax -acis m. liar nex -ecis f. murder/death opifex -icis m. workman/creator/maker pax -acis f. peace prex -ecis f. request/entreaty/prayer/good wish radix -icis f. root/foot of hill/foundation (fig) rex -egis m. king/leader/patron supplex -icis m. suppliant vertex -icis m. whirlpool/eddy/crown of head/summit vindex -icis m. champion/protector/liberator/avenger *** -itis, -etis, -utis, -udis, -odis, -edis, -idis ales -itis f. bird aries -etis m. ram custos -odis m. guardian eques -itis m. horseman fraus -udis f. deceit/fraud/error/harm gurges -itis m. gulf/sea/flood heres -edis m. heir/heiress hospes -itis m. host/guest/foreigner/stranger interpres -etis m. negotiator/explainer iuventus -utis f. youth lapis -idis m. stone/precious stone laus -udis f. praise/renown/credit miles -itis m. soldier mos -oris m. custom/habit/fashion/mode nepos -otis m. grandson/descendant obses -idis m. hostage palus -udis f. marsh/swamp paries -etis m. wall of house pecus -udis f. herd pedes -itis m. foot soldier pes -edis m. foot quies -etis f. peace/quiet requies -etis f. -repose/rest ros -oris m. dew sacerdos -otis m. priest/priestess salus -utis f. health/salvation/prosperity/greeting seges -itis f. cornfield/crop senectus -utis f. old age servitus -utis f. servitude/slavery virtus -utis f. manliness/courage/merit/virtue *** -is bes -essis m. two thirds of calx -lcis f. ash/lime/chalk/heel/foot caro -rnis f. flesh coniunx -ngis m. consort/wife/husband/bride consul -is m. consul daps -apis f. meal/religious feast frux -ugis f. fruits of the earth fur -uris m. thief hiems -emis f. winter/cold lex -egis f. law lux -ucis f. light merces -edis f. pay/fee/reward nix -ivis f. snow ops -pis f. power/strength/help pell -is f. hide/skin plebs -bis f. common person princeps -ipis m. leader/chief/emperor pyramis -idis f. pyramid sal -is m. salt/brine/sea/wit sol -is m. sun stirps -pis f. stock/root/lineage/offspring/origin sus -is m.f. swine; hog, pig, sow tellus -uris f. earth/ground/country/land trabs -bis f. beam/timber/tree/roof vall -is f. valley vigil -is m. sentry vox -ocis f. voice Neuter nouns*** aenigma -atis n. figure/allegory aes -eris n. - copper/bronze cacumen -inis n. an extremity/point/peak/top/summit cadaver -eris n. corpse/carcass carmen -inis n. song/poetry cor -rdis n. heart/soul/mind corpus -oris n. body/substance/flesh/corpse/person/individual emblema -atis n. emblem/mosaic flumen -inis n. stream/river/flood/flow gramen -inis n. grass/herb iter -ineris n. journey/route ius -uris n. law/code/rule lac -ctis n. milk marmor -oris n. marble mel -llis n. honey/sweetness nomen -inis n. name/means of knowing sulphur -uris n. sulphur scelus -eris n. crime/evil deed/sin/wickedness semen -inis n. seed onus -eris n. burden opus -eris n. work/workmanship/artwork/book os oris n. mouth/opening/entrance papaver -eris n. poppy piper -eris n. pepper pondus -eris n. weight/mass/load/burden sidus -eris n. group of stars/constellation tempus -oris n. time/period/season/interval tuber -eris n. lump/swelling vas -sis n. vessel/dish/flask uber -eris n. breast/teat vellus -eris n. fleece, pelt,wool ver -eris n. - spring verber -eris n. scourge/flogging/lash volumen -inis n. roll/coil/wreath/book *** (sg. abl. -i/-e) caput -itis n. head decor -oris n. ornament/decoration/grace/honour/dignity (A2) Non-increasing [return to top] canis -is m.f. (dog) canis -is m.f. dog frater -tris m. brother iuvenis -is m. young man mater -tris f. mother pater -tris m. father/forefathers/elders sedes -is f. seat/abode/habitation/base senex -nis m. old man/woman vates -is m.f. prophet/soothsayer/bard/poet (B) Plural genitive in -ium(sg. abl. -i/-e) [return to top] (B1) Non-increasing avis -is f. bird adfinis -is m. - relative amnis -is m. river apis -is f. bee auris -is f. ear axis -is m. axle/chariot/sky bilis -is f. bile/gall/anger/displeasure civis -is m. citizen classis -is f. fleet clavis -is f. key collis -is m. hill ensis -is m. sword familiaris -is m. familiar friend fascis -is m. bundle of wood finis -is m. boundary/limit/territory/end foris -is f. door/gate funis -is m. funeral/pyre/corpse/destruction hostis -is m. enemy ignis -is m. fire imber -bris m. rain/shower intellectualis -is m. intelligence mensis -is m. month messis -is f. harvest navis -is f. ship +nubes -is f. cloud/veil ovis -is f. sheep panis -is m. bread/loaf pellis -is f. hide/skin pestis -is f. pestilence/plague/pest piscis -is m. fish popularis -is m. fellow countryman/associate postis -is m. door puppis -is f. poop/stern of ship ratis -is f. raft/vessel rupes -is f. crag/rock saepes -is f. hedge/fence/enclosure supernaturalis -is m. supernatural testis -is m. witness valles -is f. valley venter -tris m. belly/stomach vermis -is m. worm vestis -is f. clothing vicis -is f. change/alteration/fate/turn vitis -is f. vine volucris -is f. bird Neuter nouns*** cubile -is n. bed/couch exemplaris -is n. pattern mare -is n. (sea) rete -is n. net sedīle -is n. seat/chair *** (sg. abl. -e only) aedes -is f. temple/house caedes -is f. carnage/slaughter/murder clades -is f. disaster fames -is f. hunger/famine/greed moles -is f. bulk/mass/dam/burden proles -is f. offspring/progeny pubes -is f. young men/youth soboles -is f. sprout/shoot/offspring/race/lineage strages -is f. overthrow/havoc/carnage (B2) Increasing [return to top] ------- (single syllable) lis lit-is f. dispute mus, -uris m.f. rat plus, -uris m.f. more ------- (multiple consonant ending in stem) adulescens -entis m. youth cliens -entis m. dependent/retainer continens -entis f. mainland discordans -antis f. discordant gens -entis f. family stock/clan/nation/race/tribe mens -entis f. mind/judgement/design/plan mons -ontis m. mountain occidens -entis m. west orbs -bis m. circle/disc/ring/orbit oriens -entis m. east parens -entis m. parent sors -rtis f. lot/oracle/destiny/fate ------- (Neuter nouns ending in -al, -ar, -e) animal -lis n. animal calcar -ris n. spur nectar -ris n. nectar/balm/honey vectigal -lis n. tax/toll/tribute/revenue *** (sg. abl. -e only) ars -rtis f. art/skill arx -rcis f. citadel/peak/summit dens -entis m. tooth fons -ontis m. fountain/spring/source frons -ontis f. brow/forehead/front frons -ondis f. leaf/foliage mors -rtis f. death nox -ctis f. night os -ssis n. bone pars -rtis f. part/share/stage character/faction pons -ontis m. bridge urbs -bis f. city (C) Irregulars [return to top] febris, -is f. (fever) basis -is f. foundation/base/support/pedestal febris, -is f. fever genesis, -is f. birth haeresis, -is f. sect metamorphosis -is f. transformation securis, -is f. axe sitis, -is f. thirst turris, -is f. tower tussis, -is f. cough bos, -ovis, m. cow [bos, bovis, bovi, bovem, bove boves, boum, bobus, boves, bobus] nihil / nil, n. nothing (indeclinable) vis, -is, f. force/might [vis, vis, vi, vim, vi vires, virium, viribus, vires, viribus]