| cassetterecorder | cassette recorder |
| Cassini | Cassini |
| Cassiodorus | Cassiodorus |
| Cassiope | Cassiope |
| Cassiopea | Cassiopeia |
| Cassiopeia | Cassiopeia |
| cassis | cassis |
| Cassius Chaerea | Cassius Chaerea |
| Cassius Dio | Cassius Dio |
| Cassivelaunus | Cassivellaunus |
| cassière | cashier |
| Cassiël | Cassiel |
| cast | cast |
| Casta | Casta |
| Castagnac | Castagnac |
| castagnet | castanet |
| castagnetten | castanets |
| Castalla | Castalla |
| Castanet-le-Haut | Castanet-le-Haut |
| Castanheira de Pêra | Castanheira de Pera |
| Castasegna | Castasegna |
| Casteggio | Clastidium |
| Castel del Monte | Castel del Monte |
| Castel di Judica | Castel di Judica |
| Castel Focognano | Rassina |
| Castel Gandolfo | Castel Gandolfo |
| Castel Maggiore | Castel Maggiore |
| Castel San Pietro | Castel San Pietro |
| Castel Viscardo | Castel Viscardo |
| Castelar | Castelar |
| Casteldelfino | Casteldelfino |
| Castelfranco Veneto | Castelfranco Veneto |
| Castellammare di Stabia | Castellammare di Stabia |
| Castellammarijnse oorlog | Castellammarese War |
| Castellanos | Castellanos Department |
| Castellar del Vallès | Castellar del Vallès |
| Castellbell i el Vilar | Castellbell i el Vilar |
| Castellet i la Gornal | Castellet i la Gornal |
| Castelli | Castelli |
| Castello Sforzesco | Castello Sforzesco |
| Castello-di-Rostino | Castello-di-Rostino |
| Castellum | Castellum |
| Castelló de Rugat | Castelló de Rugat |
| Castellón | Castellón |
| Castellón de la Plana | Castellón de la Plana |
| Castelmarte | Castelmarte |
| Castelnau-mierklauwier | Castelnau's antshrike |
| Castelo Branco | Castelo Branco |
| Castelo de São Jorge | Castle of São Jorge |
| Castelsarrasin | Castelsarrasin |
| Castelvetrano | Castelvetrano |
| Castelvittorio | Castelvittorio |
| Casti-Wergenstein | Casti-Wergenstein |
| Castiel | Castiel |
| castigatie | expurgation |
| castigeren | censor |
| Castiglioncello | Castiglioncello |
| Castiliaan | Castilian |
| Castiliaans | Castilian |
| Castilliaans | Castillian |
| Castillië | Castile |
| Castle Clinton National Monument | Castle Clinton |
| Castlebar | Castlebar |
| Castor | Beaver |
| Castor en Pollux | Castor and Pollux |
| Castorimorpha | Castorimorpha |
| Castorocauda | Castorocauda lutrasimilis |
| Castoroides | Castoroides |
| castorolie | castor oil |
| Castra | Castra |
| Castra Praetoria | Castra Praetoria |
| castraat | eunuch |
| castratie | castration |
| Castrelo do Val | Castrelo do Val |
| castreren | alter |
