| casuistique | casuistry |
| Casus belli | Casus belli |
| caséine | casein |
| CAT | Cat |
| Cat Ballou | Cat Ballou |
| Cat Power | Cat Power |
| Cat Stevens | Cat Stevens |
| Catabase | Katabasis |
| catabolisme | catabolism |
| Catac | Catac District |
| cataclop | clip-clop |
| cataclysme | disaster |
| catacombe | catacomb |
| Catacombes capucines de Palerme | Capuchin catacombs of Palermo |
| Catacombes de Paris | Catacombs of Paris |
| Catacombes de Rome | Catacombs of Rome |
| catadrome | catadromous |
| catafalque | catafalque |
| cataire | catmint |
| catalan | Catalan |
| Catalane | Catalan |
| catalanophone | Catalanophone |
| catalepsie | catalepsy |
| cataleptique | cataleptic |
| Catalina | Catalina |
| Catalina Castaño | Catalina Castaño |
| Catalina Cruz | Catalina Cruz |
| Catalina Sandino Moreno | Catalina Sandino Moreno |
| catalogage | listing |
| Catalogne | Catalonia |
| Catalogne Nord | Northern Catalonia |
| catalogue | catalogue |
| Catalogue AGK | Astronomische Gesellschaft Katalog |
| Catalogue alphabétique | Catalog |
| Catalogue astrographique | Astrographic catalog |
| Catalogue astronomique | Astronomical catalog |
| Catalogue de radio sources | Radio source catalogs |
| Catalogue de timbres | Stamp catalog |
| Catalogue de vente aux enchères | Auction catalog |
| Catalogue des auteurs | Author catalogue |
| Catalogue des femmes | Catalogue of Women |
| Catalogue des vaisseaux | Catalogue of Ships |
| Catalogue Henry Draper | Henry Draper catalog |
| Catalogue Hipparcos | Hipparcos Catalogue |
| Catalogue Köchel | Köchel catalogue |
| Catalogue Messier | Messier object |
| Catalogue of Principal Galaxies | Principal Galaxies Catalogue |
| Catalogue RCW | RCW Catalogue |
| Catalogue Ryom | Ryom Verzeichnis |
| Catalogue SAO | Smithsonian Astrophysical Observatory Star Catalog |
| Catalogue Tycho | Hipparcos Catalogue |
| cataloguer | categorize |
| cataloguer en tant que | stamp as |
| catalpa | catalpa |
| Catalpa bignonioides | Southern Catalpa |
| Catalysateur | Catalysis |
| catalyse | catalysis |
| Catalyse enzymatique | Enzyme catalysis |
| catalyseur | catalyst |
