| cottage | cabaña |
| cottage cheese | cottage |
| Cottan-Bimbang National Park | Parque Nacional Cottan-Bimbang |
| Cottbus | Cottbus |
| Cottens | Cottens |
| cotter | chaveta |
| Cottian Alps | Alpes Cocios |
| cotton | algodón |
| Cotton Bowl | Estadio Cotton Bowl |
| cotton candy | algodón dulce |
| cotton swab | hisopo |
| cotton wool | algo dón |
| cottonseed | semilla del algodón |
| cottonwood | álamo |
| Coturnix | Coturnix |
| cotyledon | cotiledón |
| Cotys I | Cotis I |
| couch | diván |
| Couch gag | Gag del sofá |
| couch grass | hierba rastrera |
| couchette | litera |
| CouchSurfing | CouchSurfing |
| Coude spectrographs | Espectrógrafo de foco Coude |
| cougar | puma |
| cough | carraspear |
| Cough medicine | Antitusivo |
| coughing | tos |
| Coughing fit | Acceso de tos |
| could I see the menu, please | ¿podría traerme el menú, por favor_ |
| Coulomb | Culombio |
| Coulomb's law | Ley de Coulomb |
| coulometry | coulometría |
| Coulrophobia | Coulrofobia |
| coumarin | cumarina |
| council | junta |
| Council communism | Comunismo consejista |
| Council of Ancients | Consejo de Ancianos |
| Council of Basel | Concilio de Basilea |
| Council of Chalcedon | Concilio de Calcedonia |
| Council of Clermont | Concilio de Clermont |
| Council of Constance | Concilio de Constanza |
| Council of Elrond | Concilio de Elrond |
| Council of Ephesus | Concilio de Éfeso |
| Council of Europe | Consejo de Europa |
| Council of Five Elders | Consejo de los Cinco Regentes |
| Council of Five Hundred | Consejo de los Quinientos |
| Council of Florence | Concilio de Basilea |
| Council of Jerusalem | Concilio de Jerusalén |
| Council of Laodicea | Sínodo de Laodicea |
| Council of Ministers | Consejo de Ministros de la UE |
| Council of Ministers of Spain | Composición del Gobierno de España |
| Council of Ministers of the Republic of Poland | Gobierno |
| Council of State | Consejo de Estado |
| Council of State of Luxembourg | Consejo de Estado |
| Council of the Baltic Sea States | Consejo de Estados del Mar Báltico |
| Council of the European Union | Consejo de la Unión Europea |
| Council of Three Fires | Concilio de tres fuegos |
| Council of Trent | Concilio de Trento |
| Council of Troyes | Concilio de Troyes |
| Council of Vienne | Concilio de Vienne |
| Council-manager government | Concejo municipal |
| councillor | concejal municipal |
| councilman | concejal municipal |
| councilor | consejero |
| councilperson | concejal municipal |
| Councils of Saragossa | Concilios de Zaragoza |
| Councils of Toledo | Concilios de Toledo |
| councilwoman | consejala municipal |
| counsel | abogado |
