| Castelo de Saumur | Château de Saumur |
| Castelo de Savonlinna | Olavinlinna |
| Castelo de Stahleck | Stahleck Castle |
| Castelo de Stirling | Stirling Castle |
| Castelo de São Jorge | Castle of São Jorge |
| Castelo de Torrechiara | Torrechiara |
| Castelo de Urquhart | Urquhart Castle |
| castelo de vento | castle in the air |
| Castelo de Wartburg | Wartburg Castle |
| Castelo de Windsor | Windsor Castle |
| castelo no ar | castle in the air |
| Castelo Real de Laeken | Royal Castle of Laeken |
| Castelo roqueiro | Rock of Cashel |
| Castelo Rosenborg | Rosenborg Castle |
| Castelo Vaduz | Schloss Vaduz |
| Castelos cátaros | Cathar castles |
| Castelrotto | Kastelruth |
| Castelvetrano | Castelvetrano |
| Castelvittorio | Castelvittorio |
| Castform | Castform |
| Casti connubii | Casti Connubii |
| Casti-Wergenstein | Casti-Wergenstein |
| castidade | chastity |
| Castiel | Castiel |
| castigado pelo mau tempo | weather-beaten |
| castigado pelo tempo | weather-beaten |
| castigar | scourge |
| castigar imerecidamente | victimize |
| Castiglione | Castiglione |
| castigo | penalization |
| castigo físico | corporal punishment |
| Castilla-La Mancha | Castile-La Mancha |
| Castillonuevo | Castillo-Nuevo |
| castiçal | candlestick |
| Castle Bruce | Castle Bruce |
| Castle Howard | Castle Howard |
| Castle of Illusion | Castle of Illusion Starring Mickey Mouse |
| Castlebar | Castlebar |
| casto | virtuous |
| castor | beaver |
| castor americano | American beaver |
| castor canadense | American beaver |
| Castor e Pólux | Castor and Pollux |
| Castor Palito | Castor Oyl |
| Castor-gigante | Giant Beaver |
| Castorocauda | Castorocauda lutrasimilis |
| castrado | emasculate |
| castradode | gelded |
| castrar | alter |
| castrarade | to geld |
| castração | castration |
| castração (de animal) | altering |
| Castrelo do Val | Castrelo do Val |
| Castries | Castries |
| Castrisch | Castrisch |
| Castro Alves | Castro Alves |
| Castro de Rei | Castro de Rei |
| Castro-Urdiales | Castro Urdiales |
| castrão | wether |
| castuveira | tailor |
| castão | fort |
| casual | casual |
