| common character signalling channel | Zentral-Zeichengabekanal |
| common charges | gemeine Figuren |
| common chickweed | Vogelmiere |
| Common chiffchaff | Zilpzalp |
| Common Chimpanzee | Gemeiner Schimpanse |
| common chinchilla | Wollmaus |
| common chockchafer | Feldmaikäfer |
| common cicadabird | Mönchsraupenfänger |
| common clothes moth | Kleidermotte |
| common clouded yellow | Achter |
| common clover | Rotklee |
| common cold | Erkältung |
| common cold research | Erkältungsforschung |
| common cold virus | Erkältungsvirus |
| common cold viruses | Erkältungsviren |
| common colds | Erkältungen |
| common collector | Kollektorschaltung |
| common collector circuit | Kollektorschaltung |
| common collector connection | Emitterfolger |
| common comfrey | Himmelsbrot |
| common commercial policy | Gemeinsame Handelspolitik |
| common communication support | Gemeinsame Kommunikationsunterstützung |
| common comphrey | Himmelsbrot |
| common control | Zentralsteuerung |
| common control channel | Kanäle mit gemeinsamer Steuerung |
| Common Coquí | Coquí |
| common core | Pflichtfächer |
| common corn salad | Mausohr |
| common corundum | gemeiner Korund |
| Common Cottongrass | Schmalblättriges Wollgras |
| common council | Gemeinderat |
| common council decision | Gemeinderatsbeschluss |
| common council decisions | Gemeinderatsbeschlüsse |
| common councils | Gemeinderäte |
| common cowslip | Echte Schlüsselblume |
| common cranberry | Gewöhnliche Moosbeere |
| common crane | Kranich |
| common crime | allgemeine Kriminalität |
| common criminal | gewöhnliche Kriminelle |
| Common Criteria | Common Criteria for Information Technology Security Evaluation |
| Common Crossbill | Fichtenkreuzschnabel |
| common crossing | Herz |
| common crow-pheasant | Heckenkuckuck |
| common crowned pigeon | Gewöhnliche Krontaube |
| common cuckoo | Kuckuck |
| common curlew | Großer Brachvogel |
| common currency | Gemeinschaftswährung |
| Common Cuttlefish | Gewöhnlicher Tintenfisch |
| Common Czech | Gemeintschechisch |
| Common dab | Kliesche |
| Common dace | Hasel |
| common daisies | Magerwiesen-Margeriten |
| common daisy | Gänseblümchen |
| common dandelion | Löwenzahn |
| Common Darter | Große Heidelibelle |
| common decency | Abstand |
| common defence policy | gemeinsame Verteidigungspolitik |
| common degu | Gewöhnlicher Degu |
| common degus | Gewöhnliche Degus |
| common delphinula | Delfinschnecke |
| common denominator | gemeinsamer Nenner |
