| consumible | expendable |
| consumido | worn-out |
| consumidor | acceptor |
| consumidora | consumer |
| consumir | wear out |
| consumirse | burn out |
| consumismo | consumerism |
| consumo | use |
| consumo de combustible | fuel consumption |
| consumo de electricidad | electricity consumption |
| consumo de energía | energy consumption |
| consumo de energía primaria | primary energy consumption |
| consumo de materia prima | raw material consumption |
| consumo de paisaje | landscape consumption |
| consumo de petróleo | petroleum consumption |
| consumo diario aceptable | acceptable daily intake |
| Consus | Consus |
| contabilidad | accountancy |
| contabilidad ambiental | environmental accounting |
| contabilidad ambiental nacional | national environmental accounting |
| contabilidad ecológica | ecological bookkeeping |
| contabilidad nacional | national accounting |
| Contabilidad por partida doble | Double-entry bookkeeping system |
| contable | accountant |
| contacto | connection |
| Contacto de punto cuántico | Quantum point contact |
| contacto flojo | loose contact |
| contacto sexual | intercourse |
| contacto visual | eye contact |
| contado | seldom |
| contador | accountant |
| contador Geiger | Geiger counter |
| Contador proporcional | Proportional counters |
| contador público | certified public accountant |
| Contador Tcherenkov | Cerenkov counter |
| Contador web | Web counter |
| contadora | accountant |
| contadora pública | certified public accountant |
| contaduría | bookkeeping |
| contagiar | communicate |
| contagiar con | infect with |
| contagio | contagion |
| contagiosidad | contagiousness |
| contagioso | infectious |
