| common denominator | común denominador |
| Common descent | LUCA |
| Common Desktop Environment | Common Desktop Environment |
| Common Development and Distribution License | Common Development and Distribution License |
| common divisor | común divisor |
| Common Duiker | Sylvicapra grimmia |
| Common Dwarf Mongoose | Hyaena hyaena |
| Common Eider | Somateria mollissima |
| Common Era | era común |
| Common evenig primrose | Oenothera |
| common factor | común divisor |
| Common Fig | breva |
| Common Foreign and Security Policy | Relaciones exteriores de la Unión Europea |
| Common fractions | Fracción |
| Common Frog | Rana temporaria |
| Common Gateway Interface | Interfaz de entrada común |
| Common Genet | Genetta genetta |
| Common Gorse | Ulex europaeus |
| Common greenshank | Tringa nebularia |
| common ground | superficie de contacto |
| Common Guillemot | Uria aalge |
| common gull | gaviota |
| Common Hawthorn | Crataegus monogyna |
| Common Hazel | Corylus avellana |
| common hepatica | hepática |
| Common Hogweed | Heracleum sphondylium |
| Common Horse-chestnut | Aesculus hippocastanum |
| Common horsechestnut | Aesculus hippocastanum |
| Common house martin | Delichon urbicum |
| Common house-martin | Delichon urbicum |
| Common inn stay | Sector servicios |
| Common Intermediate Format | CIF |
| Common Intermediate Language | MSIL |
| common kestrel | cernícalo común |
| Common Kingfisher | Alcedo atthis |
| common lavender | lavanda fina |
| Common Lisp Object System | CLOS |
| Common Market | Mercado Común |
| common marmoset | tití común |
| Common Medlar | Mespilus germanica |
| Common Mudpuppy | Necturus maculosus |
| common name | nombre común |
| Common Nighthawk | Chordeiles minor |
| Common Noctule | Nyctalus noctula |
| common noun | nombre común |
| Common Object Request Broker Architecture | CORBA |
| Common Octopus | Octopoda |
| common people | pueblo |
| common person | ciudadano |
| Common Pheasant | Phasianus colchicus |
| Common Pipistrelle | Pipistrellus pipistrellus |
| Common Pochard | Aythya ferina |
| common quail | codorniz común |
| Common Redpoll | Carduelis flammea |
| Common Redshank | Tringa totanus |
| Common Ringtail Possum | Pseudocheirus peregrinus |
| Common Rue | Ruta graveolens |
| Common sawfish | Saw |
| common sense | sentido común |
| Common Shag | Phalacrocorax aristotelis |
| Common skate | Skadi |
| Common Slavic | protoeslavo |
| Common snakeneck turtle | Chelodina longicollis |
| Common soft wheat | Triticum aestivum |
| Common sole | Solea solea |
| Common speach | Slang |
| Common Spotted Cuscus | Spilocuscus maculatus |
| Common Squirrel Monkey | Saimiri sciureus |
| common tariff policy | política arancelaria común |
| Common Teal | Anas crecca |
| Common Tern | Charrán común |
| Common Treecreeper | Certhia familiaris |
| Common Unix Printing System | Common Unix Printing System |
| Common Vampire Bat | Desmodus rotundus |
| Common white-eye | Aythya nyroca |
| common whitefish | farra |
| Common Wombat | Wombat común |
| Common wood pigeon | Columba palumbus |
| Common year starting on Friday | Año común comenzado en viernes |
| Common year starting on Monday | Año común comenzado en lunes |
| Common year starting on Saturday | Año normal comenzado en sábado |
| Common year starting on Sunday | Año común comenzado en domingo |
| Common year starting on Thursday | Año común comenzado en jueves |
| Common year starting on Tuesday | Año común comenzado en martes |
| Common year starting on Wednesday | Año común comenzado en miércoles |
| common-law marriage | unión de hecho |
| Common-mode rejection ratio | Rechazo al modo común |
| commonalty | generalidad |
| commoner | ciudadano |
| Commoners | Estado llano |
| commonly | comúnmente |
| commonplace | ordinario |
| commons | pueblo |
| Commonwealth | la Comunidad de Naciones |
| Commonwealth Games | Juegos de la Mancomunidad |
| Commonwealth of Australia | Australia |
| Commonwealth of Dominica | Dominica |
| Commonwealth of Independent States | CEI |
| Commonwealth of Independent States Cup | Copa de la CIS |
| Commonwealth of Nations | Mancomunidad Británica de Naciones |
| Commonwealth of the Bahamas | Bahamas |
| Commonwealth realm | Monarquía en la Mancomunidad de Naciones |
| Commonwealth Stadium | Estadio de la Mancomunidad |
| commotion | conmoción |
