| collier | necklet |
| colligativo | colligative |
| Collimatori | Collimators |
| collina | elevation |
| Collina delle Croci | Hill of Crosses |
| Collina di Tara | Hill of Tara |
| collinare | hilly |
| Colline del Chianti | Chianti |
| Colline-Beaumont | Colline-Beaumont |
| Collines | Collines Department |
| collinetta | hillock |
| collinoso | hilly |
| Collins | Collins |
| Collins glass | Collins glass |
| Collio | Brda |
| Collioure | Collioure |
| colliquare | colliquate |
| collirio | eyewash |
| collisione | crash |
| Collisione hash | Hash collision |
| collo | collar |
| collo a V | V-neck |
| collo alto | turtleneck |
| collo del piede | instep |
| collo dell'utero | cervix |
| collo della scarpa | instep |
| collocare | position |
| collocare come apprendista | apprentice |
| collocarsi | take place |
| collocato | situated |
| collocazione | location |
| Collodio umido | Collodion process |
| colloidale | colloidal |
| colloide | colloid |
