| Claudius | Claudius |
| Claudius I | Claudius |
| Claudius II | Claudius II |
| Claus Schenk Graf von Stauffenberg | Claus von Stauffenberg |
| claustrophobia | klaustrofobi |
| clavicle | kraveben |
| Claviorganum | Claviorganum |
| claw | klo |
| claw hammer | kløftehammer |
| clay | ler |
| Clay County | Clay County |
| Clay minerals | Ler |
| Clayton Anderson | Clayton Conrad Anderson |
| clean | ren |
| clean air area | luftrum uden forurening |
| clean air car | miljøvenlig bil |
| clean technology | ren teknologi |
| cleaning up | sanering |
| cleanliness | renlighed |
| cleanse | gøre ren |
| cleansing department | renholdningsselskab |
| clear | lys |
| clearing sludge | rensning af slam |
| clef | nøgle |
| Clefs | Nøgle |
| cleft | revne |
| Cleft of venus | Kameltå |
| Clemens Brentano | Clemens Brentano |
| Clement Attlee | Clement Attlee |
| Clement of Alexandria | Clemens af Alexandria |
| Clementine probe | Clementine-missionen |
| Cleopatra | Kleopatra |
| Cleopatra Selene | Cleopatra Selene |
| Cleopatra Selene II | Cleopatra Selene |
| Clergy | Gejstlighed |
| clergyman | præst |
| Clerical fascism | Gejstlig fascisme |
| Clerity | Celeritas |
| clerk | kontorassistent |
| clerks residence | degnegaard |
| Clermont-Ferrand | Clermont-Ferrand |
| Clerodendrum | Skæbnetræ |
| Clethra | Konvalbusk-slægten |
| Clethraceae | Konvalbusk-familien |
| Cletus Spuckler | Cletus Spuckler |
| Cleveland | Cleveland |
| Cleveland Abbe | Cleveland Abbe |
| Cleveland Browns | Cleveland Browns |
| Cleveland Indians | Cleveland Indians |
| clever | smart |
| Clever fellow | Fugl |
| Click Here to Exit | Click Here to Exit |
| Cliens | Klient |
| client | kunde |
| clientele | klientel |
| cliff | klint |
| Cliff Burton | Cliff Burton |
| Cliff Richard | Cliff Richard |
| Cliffoney | Cliffony |
| climate | klima |
| climate change | klimaforandring |
| climate protection | klimabeskyttelse |
| climate resource | klimaressourcer |
| climate type | klima |
| climatic alteration | klimaændring |
| climatic change | klimaforandring |
| climatic effect | klimatisk virkning |
| climatic experiment | klimatisk eksperiment |
| climatic zone | klimaområde |
| climatology | klimatologi |
| climax | klimaks |
| climb | klatre |
| climbing plant | klatreplante |
| clinic | sygehus |
| Clinical depression | Depression |
| Clinical neurophysiology | Neurofysiologi |
| Clinical pharmacy | Klinisk farmaci |
| clinical psychology | klinisk psykologi |
| clinical symptom | klinisk symptom |
| Clinophobia | Hypnofobi |
| Clint Eastwood | Clint Eastwood |
| Clinton | Clinton |
| Clio | Kleio |
| clip | klippe |
| Clip together | Fastgøre |
| CLIPSAS | CLIPSAS |
| clit | klitoris |
| Clitocybe nebularis | Tåge-Tragthat |
| clitoris | klitoris |
| Clitorism | Klitorisme |
| Clive Owen | Clive Owen |
| Clive Sinclair | Clive Sinclair |
| Clivia | Clivia |
| clock | ur |
| Clock Tower | Big Ben |
| Cloistered rule | Klosterstyre |
| Clone Wars | Clone Wars |
| cloning | kloning |
| Cloning vector | Vektor |
| Clonmel | Clonmel |
| close | lukke |
| close, but no cigar | lige ved og næsten slår ingen mand af hesten |
| closed | lukket |
| closer | nærmere |
| closest | nærmest |
| closet | skab |
| closing down | nedlukning |
| clothe | beklæde |
| clothes | tøj |
| clothes peg | tøjklemme |
| clothes-brush | klædebørste |
| clothing | beklædning |
| clothing industry | beklædningsindustri |
| Clotho | Klotho |
| cloud | sky |
| Cloud City | Cloud City |
| cloud computing | cloudcomputing |
| Cloud forest | Tågeskov |
| cloudberry | multebær |
| cloudburst | skybrud |
| Clouded apollo | Mnemosyne |
| CloudSat | Cloudsat |
| cloudy | overskyet |
| clove | fed |
| clover | kløver |
| clown | klovn |
| club | klub |
| Club América | Amerika |
| Club Atlético Boca Juniors | Boca Juniors |
| Club de Regatas Vasco da Gama | Vasco da Gama |
| Club of Rome | Romklubben |
| Clube de Regatas do Flamengo | Clube de Regatas do Flamengo |
| clubs | klør |
| clue | nøgle |
| Cluedo | Cluedo |
| Cluj | Cluj |
| Cluj County | Cluj |
| Cluj-Napoca | Cluj-Napoca |
| Cluny | Cluny |
