| castillo de arena | sandcastle |
| Castillo de Ashtown | Ashtown Castle |
| Castillo de Balmoral | Balmoral Castle |
| Castillo de Bellver | Bellver Castle |
| Castillo de Berg | Berg Castle |
| Castillo de Birr | Birr Castle |
| Castillo de Blois | Château de Blois |
| Castillo de Bolingbroke | Bolingbroke Castle |
| Castillo de Bonaguil | Château de Bonaguil |
| Castillo de Bran | Bran Castle |
| Castillo de Brie-Comte-Robert | Château de Brie-Comte-Robert |
| Castillo de Caernarfon | Caernarfon Castle |
| Castillo de Caerphilly | Caerphilly Castle |
| Castillo de Cahir | Cahir Castle |
| Castillo de Cardiff | Cardiff Castle |
| Castillo de Chambord | Château de Chambord |
| Castillo de Chapultepec | Chapultepec Castle |
| Castillo de Cheverny | Château de Cheverny |
| Castillo de Chillon | Château de Chillon |
| Castillo de Clermont | Château de Clermont |
| Castillo de Clos-Lucé | Clos Lucé |
| Castillo de Colditz | Colditz Castle |
| Castillo de Dublín | Dublin Castle |
| Castillo de Dundrum | Dundrum Castle |
| Castillo de Dunstaffnage | Dunstaffnage Castle |
| Castillo de Durham | Durham Castle |
| Castillo de Edimburgo | Edinburgh Castle |
| Castillo de Eilean Donan | Eilean Donan |
| Castillo de Foix | Château de Foix |
| Castillo de Frederiksborg | Frederiksborg Palace |
| Castillo de Guimaraes | Castle of Guimarães |
| Castillo de Hartheim | Schloss Hartheim |
| Castillo de Haut-Koenigsbourg | Château du Haut-Kœnigsbourg |
| Castillo de Himeji | Himeji Castle |
| Castillo de Howard | Castle Howard |
| Castillo de Javier | Xaver |
| Castillo de Loarre | Loarre Castle |
| Castillo de los Este | Castello Estense |
| Castillo de Louveciennes | Château de Louveciennes |
| Castillo de Ludlow | Ludlow Castle |
| Castillo de Malbork | Malbork Castle |
| Castillo de Malmaison | Château de Malmaison |
| Castillo de Matsumoto | Matsumoto Castle |
| Castillo de Miramare | Miramare |
| Castillo de Montgilbert | Château de Montgilbert |
| Castillo de Montségur | Montségur |
| Castillo de Nagoya | Nagoya Castle |
| Castillo de Osaka | Osaka Castle |
| Castillo de Osborne | Osborne House |
| Castillo de Pau | Château de Pau |
| Castillo de Pembroke | Pembroke Castle |
| Castillo de Peyrepertuse | Peyrepertuse |
| Castillo de Possenhofen | Possenhofen Castle |
| Castillo de Praga | Prague Castle |
| castillo de proa | fo'c'sle |
| Castillo de Puilaurens | Puilaurens |
| Castillo de Puivert | Château de Puivert |
| Castillo de Quéribus | Château de Quéribus |
| Castillo de Riga | Riga Castle |
| Castillo de Roquetaillade | Château de Roquetaillade |
| Castillo de Salses | Fort de Salses |
| Castillo de San Jorge de Lisboa | Castle of São Jorge |
| Castillo de San Pedro de Halicarnaso | Bodrum Castle |
| Castillo de San Pedro de la Roca | Castillo de San Pedro de la Roca |
| Castillo de Sandal | Sandal Castle |
| Castillo de Sedan | Château de Sedan |
| Castillo de Sheffield | Sheffield Castle |
| Castillo de Shuri | Shuri Castle |
| Castillo de Stirling | Stirling Castle |
| Castillo de Termes | Château de Termes |
| Castillo de Tonquédec | Château de Tonquédec |
| Castillo de Trenčín | Trenčín Castle |
| Castillo de Turku | Turku Castle |
| Castillo de Urquhart | Urquhart Castle |
| Castillo de Vincennes | Château de Vincennes |
| Castillo de Vitré | Château de Vitré |
| Castillo de Wartburg | Wartburg Castle |
| Castillo de Warwick | Warwick Castle |
| Castillo de Windsor | Windsor Castle |
| Castillo de Červený Kameň | Červený Kameň Castle |
| Castillo Edo | Edo Castle |
| castillo en el aire | castle in the air |
| Castillo Grayskull | Castle Grayskull |
| Castillo Sforzesco | Castello Sforzesco |
| Castillo Slane | Slane Castle |
| Castillo Weissenstein | Schloss Weissenstein |
| Castillo-Gaillard | Château-Gaillard |
| Castillonuevo | Castillo-Nuevo |
| Castillos cátaros | Cathar castles |
| Castillos de España | List of castles in Spain |
| Castillos de Lastours | Châteaux de Lastours |
| castillos de naipes | castle in the air |
| Castillos del Loira | Châteaux of the Loire Valley |
| castillos en el aire | castle in the air |
| castizo | genuine |
| Castle of Illusion Starring Mickey Mouse | Castle of Illusion Starring Mickey Mouse |
| casto | pure |
| castor | beaver |
| Castor gigante | Giant Beaver |
| Castoridae | Castoridae |
| Castoroides | Giant Beaver |
| castración | castration |
| castrado | emasculate |
| castrar | alter |
| Castrelo del Valle | Castrelo do Val |
| Castries | Castries |
| Castrisch | Castrisch |
| castro | castle |
| Castro de Rey | Castro de Rei |
| Castro-Urdiales | Castro Urdiales |
| Castrop-Rauxel | Castrop-Rauxel |
| Castrum | Castra |
| casual | offhand |
| casualidad | possibility |
| Casualties of War | Casualties of War |
| Casuarina equisetifolia | Allocasuarina |
| Casuarinaceae | Casuarinaceae |
| casuario | cassowary |
| Casuarius bennetti | Dwarf Cassowary |
| Casuarius casuarius | Southern Cassowary |
| Casuarius unappendiculatus | Northern Cassowary |
| Casubia | Kashubians |
| casucha | slum |
| casuista | casuist |
| casulla | chasuble |
| Casus belli | Casus belli |
| casuística | casuistry |
| Cat Island | Cat Island |
| Cat Power | Cat Power |
| Cat Stevens | Cat Stevens |
| cataclismo | disaster |
| catacresis | catachresis |
| catacumba | catacomb |
