| Cluj | Cluj |
| Cluj-Napoca | Cluj-Napoca |
| Cluny | Cluny |
| Clustering | Klassifikationssystem för bibliotek |
| Clyde Tombaugh | Clyde Tombaugh |
| Cláudio Taffarel | Cláudio Taffarel |
| Clémence Poésy | Clémence Poésy |
| Cléo de Mérode | Cléo de Mérode |
| CM | Cm |
| CMOS | CMOS |
| CMYK | CMYK |
| CN | CN |
| CN Tower | CN Tower |
| CNC | CNC |
| Cnidaria | Nässeldjur |
| Cnido | Knidos |
| CNN | CNN |
| Cnosso | Knossos |
| CO | CO |
| co-incenerimento | medförbränning |
| coabitare | sammanbo |
| coabitazione | sammanboende |
| coach | tränare |
| Coachella Valley Music and Arts Festival | Coachella Valley Music and Arts Festival |
| coadiuvante | medhjälpare |
| coagulante | koagel |
| coagulare | tjockna |
| coagularsi | koagulera |
| coagulato | klumpig |
| coagulazione | koagulering |
| Coagulazione del sangue | Blodkoagulering |
| Coahuila | Coahuila |
| coalizione | block |
| Coalizione multinazionale in Iraq | Multinationella styrkan i Irak |
| Coarticolazione | Koartikulation |
| Coati | Näsbjörnar |
| Coatlicue | Coatlicue |
| coatto | pöbel |
| coazione | begär |
| Cobalamina | Kobalamin |
| cobalto | kobolt |
| Cobitidae | Grönling |
| Coblenza | Koblenz |
| COBOL | COBOL |
| Coburg | Coburg |
| Coburgo | Coburg |
| coca | kola |
| Coca-Cola | Coca-Cola |
| Coca-Cola Blāk | Coca-Cola BlāK |
| Coca-Cola Lemon | Coca-Cola Lemon |
| cocaina | kokain |
| coccarda | devis |
| coccatrice | basilisk |
| cocchiere | kusk |
| coccige | svansben |
| coccinella | nyckelpiga |
| Coccinellidae | Nyckelpigor |
| Cocciniglie | Kochenillsköldlus |
| coccio | mes |
| cocciuta | oroselement |
| cocciuto | motsträvig |
| cocco | hjärtegryn |
| coccodrilli | krokodil |
| coccodrillo | krokodil |
| coccodè | skrockande |
| Coccoidea | Sköldlöss |
| coccola | bär |
| coccolare | krama |
| coccolo | rar |
| cocente | svidande |
| Cochabamba | Cochabamba |
| Cocincina | Cochinkina |
| Cocito | Cocytus |
| Cock Sparrer | Cock Sparrer |
| Cockburn Town | Cockburn Town |
| cocker | cockerspaniel |
