| Comino | Comino |
| Cominotto | Cominotto |
| Comintern | Międzynarodówka Komunistyczna |
| Comisión de Actividades Infantiles Comodoro Rivadavia | CAI Comodoro Rivadavia |
| Comitatus | Komitat |
| Comitium | Comitium |
| comma | przecinek |
| Comma Johanneum | Comma Johanneum |
| Comma-separated values | CSV |
| Commagene | Kommagena |
| command | komenda |
| Command line interpreter | Powłoka systemowa |
| Command pattern | Wzorzec polecenia |
| commandant | dowódca |
| commander | dowódca |
| commander in chief | naczelny wódz |
| Commander Islands | Wyspy Komandorskie |
| Commander Keen series | Commander Keen |
| commanding officer | dowódca |
| commandment | przykazanie |
| Commandry | Komturia |
| Commedia dell'arte | Commedia dell'arte |
| Commelinales | Komelinowce |
| Commelinidae | Komelinowe |
| Commelinids | Komelinowe |
| Commemoratively | Pamięć człowieka |
| commencement | początek |
| commend | polecać |
| Commendation ceremony | Homagium |
| commensurate | współmierny |
| comment | komentarz |
| comment on | odnotować |
| comment out | zakomentować |
| commentary | komentarz |
| commentator | komentator |
| Commerce | Handel |
| Commerce raiding | Rajder |
| commercial | reklama |
| commercial fishery | rybołówstwo przemysłowe |
| commercial law | prawo handlowe |
| commercial noise | hałas pochodzący od obiektów handlowych i usługowych |
| commercial traffic | ruch handlowy |
| commercial transaction | transakcja handlowa |
| commercial vehicle | środek transportu towarowego |
| commercialisation | komercjalizacja |
| commercialization | komercjalizacja |
| Commercium | Komersz |
| Commercy | Commercy |
| Commerzbank Tower | Commerzbank Tower |
| Commerzbank-Arena | Commerzbank-Arena |
| Commissaire Jules Maigret | Komisarz Maigret |
| Commissar Order | Kommissarbefehl |
| commission | komisja |
| commit a suicide | zabijać |
| Commit adultery | Oszukaă |
| Commit aggression | Atakowaă |
| commit suicide | popełnić samobójstwo |
| commit to | poruczyć |
| Committed Information Rate | Committed Information Rate |
| committee | komisja |
| Committee of General Security | Komitet Bezpieczeństwa Powszechnego |
| Committee of Permanent Representatives | Komitet Stałych Przedstawicieli |
| Committee of Public Safety | Komitet Ocalenia Publicznego |
| Committee of the Regions | Komitet Regionów |
| Committee of Union and Progress | Młodoturcy |
| Committee on Data for Science and Technology | CODATA |
| commode | komoda |
| commodity | towar |
| Commodore CBM-II | Commodore CBM-II |
| Commodore International | Commodore International |
| Commodore PET | Commodore PET |
| Commodores | The Commodores |
| Commodus | Kommodus |
| common | pospolity |
| common agreement | porozumienie społeczne |
| common agricultural policy | Wspólna Polityka Rolna UE |
| common agricultural policy of the EU | Wspólna Polityka Rolna UE |
| Common basilisk | Bazyliszki |
| Common blackbird | Kos |
| Common Blue Damselfly | Nimfa stawowa |
| Common Brushtail Possum | Pałanka kuzu |
| Common Butterbur | Lepiężnik różowy |
| Common capital stock | Kapitał zakładowy |
| Common Chimpanzee | Szympans zwyczajny |
| common clothes moth | mól |
| common cold | przeziębienie |
| common commercial policy | wspólna polityka gospodarcza |
| Common Cottongrass | Wełnianka wąskolistna |
| Common Crossbill | Krzyżodziób świerkowy |
| Common Cuttlefish | Mątwa zwyczajna |
| Common Darter | Szablak podobny |
| Common descent | Ostatni uniwersalny wspólny przodek |
| Common Desktop Environment | Common Desktop Environment |
| Common Development and Distribution License | Common Development and Distribution License |
| Common Duiker | Grym |
| Common Dwarf Mongoose | Mangusta karłowata |
| Common Egg-eater | Jajożer |
| Common Eider | edredon |
| Common Era | naszej ery |
| Common Fig | Figowiec pospolity |
| Common Foreign and Security Policy | Wspólna polityka zagraniczna i bezpieczeństwa |
| Common fractions | Ułamek |
| Common Frog | Żaba trawna |
| Common Gateway Interface | CGI |
| Common Genet | Żeneta zwyczajna |
| Common grasshopper warbler | Świerszczak |
| Common greenshank | Kwokacz |
| Common Guillemot | Nurzyk |
| common guitarfish | rocha |
| common gull | mewa pospolita |
| Common Haircap | Płonnik pospolity |
| Common Hardware Reference Platform | Common Hardware Reference Platform |
| Common Hawker | Żagnica torfowa |
| Common Hawthorn | Głóg jednoszyjkowy |
| Common Hazel | Leszczyna pospolita |
| Common hepatic artery | Tętnica wątrobowa wspólna |
| common hepatica | przylaszczka pospolita |
| Common Hogweed | Barszcz zwyczajny |
| Common Horse-chestnut | Kasztanowiec zwyczajny |
| Common horsechestnut | Kasztanowiec zwyczajny |
| common horsetail | skrzyp polny |
| Common house martin | Jaskółka oknówka |
| Common house-martin | Jaskółka oknówka |
| Common inn stay | Dyýur |
| Common Intermediate Format | CIF |
| Common Intermediate Language | Common Intermediate Language |
| common kestrel | pustułka |
| common knotgrass | rdest ptasi |
| Common Language Runtime | Common Language Runtime |
| Common law spouse | Znaczący inny |
| Common ling | Molwa pospolita |
| Common Marbled Carpet | Paśnik obcinek |
| Common Merganser | Tracz nurogęś |
| common moorhen | kurka wodna |
| Common Myna | Majna brunatna |
| common nightingale | słowik rdzawy |
| Common Noctule | Borowiec wielki |
| common noun | rzeczownik pospolity |
| Common Object Request Broker Architecture | CORBA |
| Common Octopus | Ośmiornice |
| Common Pipistrelle | Karlik malutki |
| Common Public License | Common Public License |
| Common red soldier beetle | Zmięk żółty |
| Common Redshank | Krwawodziób |
| Common Rosefinch | Dziwonia |
| Common Sandpiper | Brodziec piskliwy |
| Common sawfish | Piła |
| Common Scrambling Algorithm | Common Scrambling Algorithm |
| common sense | zdrowy rozsądek |
| Common Shag | Kormoran czubaty |
| common shelduck | ohar |
| Common skate | Skadi |
| Common Slavic | prasłowiański |
| Common snakeneck turtle | Żółw wężoszyi |
| common soapwort | mydlnica lekarska |
| Common soft wheat | Pszenica zwyczajna |
| Common sole | Sola zwyczajna |
| Common Spadefoot | Grzebiuszka ziemna |
| Common Spotted Cuscus | Kuskus plamisty |
| common tariff policy | wspólna polityka celna |
| Common Teal | Cyraneczka |
| Common Tenrec | Tenrek zwyczajny |
| Common Treecreeper | Pełzacz leśny |
| Common Unix Printing System | Common UNIX Printing System |
| Common Vampire Bat | Wampir zwyczajny |
| common whitefish | sieja pospolita |
| Common Wombat | Wombat tasmański |
| Common wood pigeon | Gołąb grzywacz |
| common year | rok nieprzestępny |
| Common-pool resource | Dobra publiczne |
| commonly | codzienny |
| commonplace | pospolity |
| commonsense | zdroworozsądkowy |
| Commonwealth | Wspólnota Narodów |
| Commonwealth Games | Igrzyska Wspólnoty Narodów |
| Commonwealth Liberal Party | Związkowa Partia Liberalna |
| Commonwealth of Australia | Australia |
| Commonwealth of Dominica | Dominika |
| Commonwealth of Independent States | WNP |
| Commonwealth of Nations | Wspólnota Narodów |
| Commonwealth of the Bahamas | Bahamy |
| Commonwealth realm | Commonwealth realm |
| commotion | zamieszanie |
| Commugny | Commugny |
| Commune Opatówek | Gmina Opatówek |
| Communes of France | Gmina |
| communicable diseases | choroba zakaźna |
| communicate | przenosić |
| communication | komunikacja |
| Communication satellite | Satelita telekomunikacyjny |
| Communication source | Ekspedytor |
| communications | komunikacja |
| communications industry | przemysł komunikacyjny |
| communications policy | polityka informacji |
| communications system | system komunikowania się |
| communicative | gadatliwy |
| communion | komunia |
| Communion and Liberation | Comunione e Liberazione |
| Communiqu‚ | Kamunikat |
| communism | komunizm |
