| Word | Plural | Plural2 |
|---|---|---|
| staff | staffs | staves staff |
| formula | formulae | formulas formulæ |
| lamb | lambs | lamber lambren |
| virus | viruses | viri virii |
| beef | beef | beefs beeves |
| cow | cows | cattle kine |
| arena | arenas | arenae arenæ |
| flora | floras | florae floræ |
| iris | irises | iris irides |
| manifesto | manifestos | manifestoes manifesti |
| phoenix | phoenix | phoenixes phoenices |
| turf | turfs | turves turf |
| moran | morans | moran ilmoran |
| ethos | ethe | ethea ethoses |
| tallis | tallises | talleitim tallisim tallism |
| aura | aurae | auræ auras |
| fauna | faunae | faunas faunæ |
| inertia | inertias | inertiae inertiæ |
| buffalo | buffaloes | buffalos buffalo |
| bordeaux | bordeaux | bordeauxes bordeauxs |
| retina | retinas | retinae retinæ |
| nausea | nauseas | nauseae nauseæ |
| vagina | vaginas | vaginae vaginæ |
| persona | personas | personae personæ |
| saliva | salivas | salivae salivæ |
| casino | casinos | casinoes casini |
| ghetto | ghettos | ghettoes ghetti |
| hernia | hernias | herniae herniæ |
| soprano | sopranos | soprani sopranoes |
| hydra | hydras | hydrae hydræ |
| octopus | octopuses | octopi octopodes octopii |
| encyclopedia | encyclopedias | encyclopediae encyclopediæ |
| omnibus | omnibuses | omnibusses omnibi |
| crescendo | crescendos | crescendi crescendoes |
| larva | larvas | larvae larvæ |
| forceps | forceps | forcipes forcepses |
| rhinoceros | rhinoceros | rhinoceroses rhinoceri rhinocerotes |
| atari | atari | ataris ataries |
| innuendo | innuendoes | innuendos innuendis |
| cactus | cacti | cactuses cactus |
| corona | coronas | coronae coronæ |
| trachea | tracheas | tracheae tracheæ |
| walrus | walruses | walrus walrusses walri walrii |
| medusa | medusas | medusae medusæ |
| dermatitis | dermatitises | dermatitides dermatites |
| vulva | vulvas | vulvae vulvæ |
| cherub | cherubs | cherubim cherubims |
| zloty | zloty | zlotys zlote zlotych zloties |
| toga | togas | togae togæ |
| stiletto | stilettos | stilettoes stiletti |
| parabola | parabolas | parabolae parabolæ |
| cannula | cannulas | cannulae cannulæ |
| hippopotamus | hippopotamuses | hippopotami hippopotamus |
| fistula | fistulas | fistulae fistulæ |
| cyclops | cyclops | cyclopes cyclopses |
| loggia | loggias | logge loggie |
| spatula | spatulas | spatulae spatulæ |
| vertebra | vertebræ | vertebrae vertebras |
| necropolis | necropolises | necropoleis necropoles |
| hyena | hyenas | hyena hyenae |
| lew | lews | lewis leois |
| maxilla | maxillas | maxillae maxillæ |
| zeitgeist | zeitgeists | zeitgeister zeitgeisten |
| pupa | pupas | pupae pupæ |
| coryza | coryzas | coryzae coryzæ |
| fovea | foveas | foveae foveæ |
| bonito | bonito | bonitos bonitoes |
| zona | zonas | zonae zonæ |
| aficionado | aficionados | aficionadoes aficionadi |
| hyperbola | hyperbolas | hyperbolae hyperbolæ |
| corolla | corollas | corollae corollæ |
| glissando | glissandi | glissandos glissandoes |
| imago | imagines | imagos imagoes |
| koruna | korun | korunas koruny |
| chorea | choreas | choreae choreæ |
| medulla | medullas | medullae medullæ |
| intaglio | intagli | intaglios intaglioes intaglii |
| haematoma | haematomas | haematomata haematomae |
| impetigo | impetigos | impetigoes impetigines |
| matzo | matzos | matzot matzoth |
| abscissa | abscissas | abscissae abscissæ |
| hadith | hadith | hadiths ahadith |
| ibex | ibex | ibexes ibices |
| conjunctivitis | conjunctivitides | conjunctivitises conjunctivites |
| jack-in-the-box | jacks-in-boxes | jacks-in-the-boxes jack-in-the-boxes jacks-in-the-box |
| aula | aulas | aulae aulæ |
| cursus | cursi | cursus cursūs |
| septum | septa | septums septae |
| drachma | drachmas | drachmae drachmai |
| flagellum | flagella | flagellums flagellae |
| shigella | shigella | shigellas shigellae |
| stoa | stoae | stoæ stoai stoas |
| goy | goyim | goys goyem |
| scrofula | scrofulas | scrofulae scrofulæ |
| fibula | fibulas | fibulae fibulæ |
| seraph | seraphs | seraphim seraphims |
| trillo | trillos | trilloes trilli |
| fellah | fellahs | fellahin fellaheen |
| lymphadenitis | lymphadenitises | lymphadenites lymphadenitides |
| megalopolis | megalopolises | megalopoleis megalopoli |
| seta | setas | setae setæ |
| sonofabitch | sonofabitches | sonsofbitches sonsabitches |
| aurochs | aurochs | aurochses aurochsen |
| conceptus | conceptuses | concepti conceptūs |
| concha | conchas | conchae conchæ |
| kylix | kylikes | kylixes kylices |
| naos | naoses | naosoi naoi |
| platy | platys | platies platy |
| shtetl | shtetls | shtetlach shtetlech shtetlekh |
| mujahid | mujahideen | mujahidin mujahids |
| rusalka | rusalkas | rusalky rusalki |
| seder | seders | sidarim siddarim |
| surgeon-general | surgeons-general | surgeon-generals surgeons-generals |
| umbo | umbones | umbos umboes |
| osteomyelitis | osteomyelitides | osteomyelites osteomyelitises |
| aliya | aliyas | aliyot aliyoth aliyos |
| genizah | genizahs | genizot genizoth |
| mezuzah | mezuzahs | mezuzot mezuzoth |
| mikveh | mikvehs | mikveot mikvos mikvot mikvoth |
| myocarditis | myocardites | myocarditides myocarditises |
| paisa | paisas | paise pice |
| periplus | peripli | periploi peripluses |
| sgraffito | sgraffiti | sgraffitoes sgraffitos |
| testa | testas | testae testæ |
| uvula | uvulas | uvulae uvulæ |
| aliyah | aliyahs | aliyot aliyoth aliyos |
| areola | areolas | areolae areolæ |
| ballista | ballistas | ballistae ballistæ |
| bris | brises | brisses britot |
| fagotto | fagottos | fagottoes fagotti |
| funda | fundas | fundae fundaes |
| geniza | genizas | genizot genizoth |
| gopnik | gopniki | gopota gopari |
| haftorah | haftorahs | haftorot haftoroth |
| ictus | ictus | ictuses ictūs |
| imp. | imp. | imps. impp. |
| menorah | menoroth | menorot menorahs |
| nekropolis | nekropolises | nekropoleis nekropoles |
| pierogi | pierogi | pierogies pierogis |
| sclera | scleras | sclerae scleræ |
| scudo | scudos | scudoes scudi |
| shadchan | shadchans | shadchanim shadchonim |
| shofar | shofars | shofroth shofarot shofaroth |
| telos | teloses | teloi tele |
| testudo | testudos | testudoes testudines |
| wendigo | wendigo | wendigos wendigoes |
| Achaemenid | Achaemenids | Achaemenidae Achaemenides |
| Aggadah | Aggadahs | Aggadah Aggadot Aggadoth |
| amb. | amb.'s | amb's ambs. |
| anemia | anemias | anemiae anemiæ |
| aquafauna | aquafaunae | aquafaunas aquafaunæ |
| arbor vitae | arbor vitae | arbor vitaes arbores vitae |
| armatole | armatoles | armatoli armatoloi |
| Arsacid | Arsacids | Arsacidae Arsacides |
| asperitas | asperitates | asperitases asperitas |
| Baloch | Balochs | Baloches Baloch |
| Baluch | Baluchs | Baluches Baluch |
| beefalo | beefalo | beefalos beefaloes |
| Bigfoot | Bigfoot | Bigfeet Bigfoots |
| Bordeaux | Bordeaux | Bordeauxes Bordeauxs |
| bracha | brachot | brachos brachas |
| bureau de change | bureaux de change | bureaus de change bureau de changes |
| calpolli | calpolli | calpollis calpoltin |
| cestus | cestuses | cestus cesti |
| chalah | chalahs | chalot chaloth |
| challah | challahs | challos challot challoth |
| Charedi | Charedis | Charedi Charedim |
| cheder | cheders | chederim chedarim chadarim chadorim |
| crème brûlée | crème brûlées | crèmes brûlées crèmes brûlée |
| dermatopathic lymphadenitis | dermatopathic lymphadenitises | dermatopathic lymphadenites dermatopathic lymphadenitides |
| deus ex machina | dei ex machina | dei ex machinis deus ex machinas |
| eau de toilette | eau de toilettes | eaus de toilette eaux de toilette |
| endotesta | endotestas | endotestae endotestæ |
| eruv | eruvs | eruvim eruvin |
| Evenk | Evenks | Evenk Evenki |
| evzone | evzones | evzonoi evzoni |
| foveola | foveolas | foveolae foveolæ |
| grawlix | grawlixes | grawlix grawlices |
| haftarah | haftarahs | haftarot haftaroth |
| Haftarah | Haftarot | Haftaros Haftarahs Haftaroth |
| Halacha | Halachot | Halachoth Halachos Halachas |
| halacha | halachas | halachot halachoth halachos |
| halakha | halakhas | halakhot halakhoth halakhos |
| hallah | hallahs | hallot halloth hallos |
| haphtara | haphtaras | haphtarot haphtaroth |
| haphtarah | haphtarahs | haphtarot haphtaroth |
| Haredi | Haredis | Haredi Haredim |
| heder | heders | hederim hadarim |
| hyæna | hyæna | hyænæ hyænas |
| imbongi | izimbongi | iimbongi imbongis |
| Indian rhinoceros | Indian rhinoceros | Indian rhinoceroses Indian rhinocerotes |
| infauna | infaunas | infauna infaunae |
| inukshuk | inukshuks | inukshuit inuksuit |
| kabloona | kabloonas | kabloona kabloonat |
| kehillah | kehillahs | kehillot kehilloth |
| ketubah | ketubahs | ketubot ketuboth |
| ketubbah | ketubbahs | ketubbot ketubboth |
| khokhol | khokhols | khokhly khakhly |
| kippah | kippot | kippahs kippoth |
| knaidel | knaidels | knaidlach knaidloch |
| lagena | lagenas | lagenae lagenæ |
| lek | leks | leku lekë |
| lira | lirot | liroth liras |
| magnum opus | magna opera | magnum opuses magnum opi |
| matzoh | matzos | matzot matzohs |
| megillah | megillahs | megillot megilloth |
| mentula | mentulas | mentulae mentulæ |
| mezuza | mezuzas | mezuzot mezuzoth |
| Midrash | Midrashim | Midrashot Midrashoth |
| Miniconjou | Miniconjous | Miniconjou Miniconjoux |
| mohel | mohels | mohelim mohalim |
| moshava | moshavot | moshavoth moshavas |
| mt. | mts. | mt's mt. |
| mtn. | mtns. | mtn's mtn. |
| muwashshah | muwashshahat | tawashih muwashshahs |
| Nago | Nagos | Nagoes Nago |
| Navajo | Navajo | Navajos Navajoes |
| Negrito | Negritos | Negritoes Negrito |
| Nivkh | Nivkhs | Nivkh Nivkhi |
| nusach | nusachs | nuschaot nusachim |
| oboe d'amore | oboe d'amores | oboes d'amore oboi d'amore |
| OSS | OSSes | OSS's OSSs |
| oxea | oxea | oxeas oxeae |
| parashah | parashahs | parashot parashoth parashiot parashioth parashiyoth parashiyot |
| Picene | Picenes | Picentes Picentini |
| pruta | prutas | prutot prutoth |
| prutah | prutahs | prutot prutoth |
| psoas | psoae | psoai psoas |
| Puli | Pulik | Pulis Puli |
| pygmy hippopotamus | pygmy hippopotamuses | pygmy hippopotami pygmy hippopotamus |
| quid pro quo | quae pro quibus | quid pro quibus quid pro quos |
| raison d'être | raisons d'être | raison d'être raison d'êtres |
| real | reis | réis reals |
| rpt. | rpts. | rpt's rpts |
| Saka | Saka | Sakas Sacae |
| santim | santims | santimi santimu |
| schtetl | schtetls | schtetlach schtetlech |
| scyphistoma | scyphistomas | scyphistomae scyphistomata |
| Seleucid | Seleucids | Seleucides Seleucidae |
| serpigo | serpigos | serpigoes serpigines |
| shadkhan | shadkhans | shadkhanim shadkhonim |
| shah | shahs | shahy shahiv |
| shophar | shophars | shopharot shopharoth shophroth |
| stipula | stipulas | stipulae stipulæ |
| Strelitz | Strelitzes | Strelitzi Strelitz |
| succah | succahs | succot succoth succos |
| sukkah | sukkahs | sukkot sukkoth sukkos |
| surgeon general | surgeon generals | surgeons general surgeons generals |
| Surgeon-General | Surgeons-General | Surgeon-Generals Surgeons-Generals |
| tallit | tallits | tallitot tallitoth tallitim talleysim |
| tallith | talliths | tallithot tallithoth |
| TAS | TASs | TAS's TASes |
| tefilla | tefillot | tefilloth tefillin |
| teruah | teruahs | teruoth teruot teruos |
| Tyrannosaurus rex | Tyrannosaurus rex | Tyrannosaurus rexes Tyrannosauri reges |
| tzitzit | tzitziot | tzitzis tzitzith |
| vibratiuncula | vibratiunculæ | vibratiunculae vibratiunculas |
| Vizsla | Vizslas | Vizslak Vizslák |
| voc. | voc. | vocs. voc's |
| water buffalo | water buffalos | water buffaloes water buffalo |
| windigo | windigo | windigos windigog |
| Yanomamo | Yanomamos | Yanomami Yanomamis |
| Yid | Yidden | Yidn Yids |
| zuz | zuzim | zuzzim zuzes |
| intonaco | intonacos | intonacoes intonaci |
Note: these words have been obtained from Wiktionary and have been classified and improved through automated computer linguistics processes.