| collarbone | clavícula |
| collard greens | col verde |
| collared antshrike | batará collarejo |
| collared dove | tórtola turca |
| Collared Mangabey | Cercocebus torquatus |
| collared peccary | saíno |
| Collared Pratincole | Glareola pratincola |
| collate | intercalar |
| collateral | secundario |
| collating | colación |
| collation | colación |
| Collatz conjecture | Conjetura de Collatz |
| Colle System | Sistema Colle |
| colleague | colega |
| colleagueship | compañerismo |
| collect | unirse |
| collect call | llamada por cobrar |
| collect taxes | recaudar impuestos |
| collected | acumulado |
| Collectible card game | Juego de cartas coleccionables |
| collecting | colectivo |
| collection | grupo |
| collection of poems | colección de poemas |
| collective | común |
| collective agreement | contrato colectivo de trabajo |
| Collective Consciousness Society | CCS |
| Collective investment scheme | Fondo común de inversión |
| collective noun | sustantivo colectivo |
| Collective Security Treaty Organisation | Organización del Tratado de la Seguridad Colectiva |
| Collective Soul | Collective Soul |
| collective unconscious | inconsciente colectivo |
| collective wastewater treatment | tratamiento de aguas colectivas |
| collectively | colectivamente |
| collectivism | colectivismo |
| Collectivist anarchism | Anarquismo colectivista |
| collectivization | colectivización |
| collectivize | colectivizar |
| collector | coleccionista |
| collector's item | pieza de colección |
| Collectors Club of New York | The Collectors Club |
| Colleen McCullough | Colleen McCullough |
| college | escuela normal |
| college fees | matrícula escolar |
| college graduate | titulado de la universidad |
| college of advanced education | escuela superior |
| College of Cardinals | Colegio Cardenalicio |
| College of Europe | Colegio de Europa |
| college of higher education | escuela superior |
| collegiate | colegial |
| Collembola | Collembola |
| Collex-Bossy | Collex-Bossy |
| collide | estrellarse |
| collide with | tropezar con |
| collider | colisionador |
| collie | pastor escocés |
| collier | minero |
| colliery | mina de carbón |
| colligative | coligativo |
| Collimated light | Luz colimada |
| Collin Benjamin | Collin Benjamin |
| Collin de Plancy | Collin de Plancy |
| Collines Department | Collines |
| Collins | Tom Collins |
| Collioure | Collioure |
| collision | choque |
| Collision broadening | Ensanchamiento por colisión |
| Collision process | Proceso de colisión |
| Collision spectroscopy | Espectrocopía de colisión |
| Collision strength | Fuerza de colisión |
| Collisional excitation | Excitación de colisión |
| Collisional plasma | Plasma colisionante |
| collocation | colocación |
| Collodion process | Colodión húmedo |
| colloid | coloidal |
| colloidal state | estado coloidal |
| Collombey-Muraz | Collombey-Muraz |
| Collonge-Bellerive | Collonge-Bellerive |
| Collonges | Collonges |
| colloquial | familiar |
| colloquialism | expresión coloquial |
| colloquially | familiarmente |
| colloquy | conversación |
| Colloquy of Poissy | Conferencia de Poissy |
| collude | coludir |
| colluding | complot |
| collusion | complot |
| Collyer brothers | Hermanos Collyer |
| collyrium | colirio |
| Collège de France | Collège de France |
| Collège de Navarre | Colegio de Navarra de París |
| Colo-Colo | Colo-Colo |
| Colobanthus quitensis | Colobanthus quitensis |
| Colobinae | Colobinae |
| Coloboma | Coloboma |
