| commiserare | compadecerse de |
| commiserazione | afinidad |
| commissariato di polizia | estación de policía |
| commissario | comisario |
| commissario capo | jefe de policía |
| commissario di bordo | contador |
| Commissario europeo per la Scienza e la Ricerca | Investigación e innovación en la Unión Europea |
| Commissario Maigret | Comisario Maigret |
| commissione | comisión |
| Commissione Barroso | Comisión Barroso |
| Commissione Bulgara per i Toponimi Antartici | Comisión Búlgara para los Topónimos Antárticos |
| Commissione del diritto internazionale | Comisión de Derecho Internacional |
| Commissione Elettrotecnica Internazionale | Comisión Electrotécnica Internacional |
| Commissione Europea | Comisión Europea |
| Commissione internazionale per la caccia alle balene | Comisión Ballenera Internacional |
| Commissione per i Diritti Umani | Comisión de Derechos Humanos de las Naciones Unidas |
| commissione speciale | comisión especial |
| Commissione Trilaterale | Comisión Trilateral |
| Commissione Warren | Comisión Warren |
| Commissioni Operaie | Comisiones Obreras |
| commisurare | proporcionar |
| commisurato | proporcionado a |
| Committee on Data for Science and Technology | CODATA |
| Commodity | Commodities |
| Commodore International | Commodore International |
| Commodore PET | Commodore PET |
| Commodores | Commodores |
| commodoro | comodoro |
| Common Desktop Environment | Common Desktop Environment |
| Common Development and Distribution License | Common Development and Distribution License |
| Common Gateway Interface | Interfaz de entrada común |
| Common Intermediate Language | MSIL |
| Common Law | Derecho anglosajón |
| Common rail | Common-rail |
| Common unix printing system | Common Unix Printing System |
| Commonwealth | la Comunidad de Naciones |
