| clavicordo | clavichord |
| Claviere | Claviere |
| clavìcola | clavicle |
| Clay Mathematics Institute | Clay Mathematics Institute |
| Clay Regazzoni | Clay Regazzoni |
| Claymation | Clay animation |
| Clayton Anderson | Clayton Anderson |
| Claytonia | Claytonia |
| Claytonia perfoliata | Claytonia perfoliata |
| Claytonia sibirica | Claytonia sibirica |
| Clazomene | Klazomenai |
| Cleandro di Gela | Cleander of Gela |
| Cleante | Cleanthes |
| Clearco di Sparta | Clearchus of Sparta |
| Cleartype | ClearType |
| Clearwater | Clearwater |
| Cledauco | Cledaucus |
| Cleebronn | Cleebronn |
| Clefi | Cleph |
| Cleistocactus | Cleistocactus |
| Clelia | Clelia |
| Clem Burke | Clem Burke |
| clematide | clematis |
| Clematis flammula | Clematis flammula |
| Clematis vitalba | Clematis vitalba |
| Clemens August von Galen | Clemens August Graf von Galen |
| Clemens Brentano | Clemens Brentano |
| Clement Attlee | Clement Attlee |
| clemente | merciful |
| Clemente Alessandrino | Clement of Alexandria |
| Clemente Augusto di Baviera | Clemens August of Bavaria |
| Clemente Domínguez y Gómez | Clemente Domínguez y Gómez |
| clementina | clementine |
| clementino | clementine |
| clemenza | leniency |
| Clenleu | Clenleu |
| Cleobulo | Cleobulus |
| Cleombroto I | Cleombrotus I |
| Cleomede | Cleomedes |
| Cleomene I | Cleomenes I |
| Cleon I | Cleon I |
| Cleon II | Cleon II |
| Cleone | Cleon |
| Cleopatra | Cleopatra |
| Cleopatra di Macedonia | Cleopatra of Macedon |
| Cleopatra Euridice di Macedonia | Cleopatra |
| Cleopatra I | Cleopatra I of Egypt |
| Cleopatra II | Cleopatra II of Egypt |
| Cleopatra III | Cleopatra III of Egypt |
| Cleopatra IV | Cleopatra IV of Egypt |
| Cleopatra Tea | Cleopatra Thea |
| Cleopatra V | Cleopatra V of Egypt |
| Cleopatra VII | Cleopatra VII |
| cleptomane | kleptomaniac |
| cleptomania | kleptomania |
| Clerget | Clerget |
| clericale | clerical |
| clericalismo | clericalism |
| cleristorio | clerestory |
| Clerks II | Clerks II |
| Clermont Foot Auvergne | Clermont Foot |
| Clermont-Ferrand | Clermont-Ferrand |
| clero | clergy |
| Clerodendrum | Clerodendrum |
| Cleroidea | Cleroidea |
| cleruchia | cleruchy |
| Clervaux | Clervaux |
| clessidra | hourglass |
| Cleto | Pope Anacletus |
| Cletus e Brandine Spuckler | Cletus Spuckler |
| Cleveland | Cleveland |
| Cleveland Abbe | Cleveland Abbe |
| Cleveland Browns | Cleveland Browns |
| Cleveland Cavaliers | Cleveland Cavaliers |
| Cleveland Indians | Cleveland Indians |
| Cleveland Rockers | Cleveland Rockers |
| Cleveland street scandal | Cleveland Street scandal |
| Cleverack | Cleverack |
| clic | click |
| Clichy-sous-Bois | Clichy-sous-Bois |
| Clichè | Clich‚ |
| cliché | stereotype |
| click | click |
| Click Here To Exit | Click Here to Exit |
| Click-through rate | Click-through rate |
| Clicker training | Clicker training |
| Client di posta | E-mail client |
| cliente | patron |
| cliente abituale | patron |
