Encyclopedias, Almanacs, Transcripts, and Maps
- Carbondale
- carbonite
- Carborundum
- Carcas
- Carco, Francis
- Cardamom Hills (mountains, India)
- Cardano, Geronimo
- Cárdenas
- Cárdenas Solórzano, Cuauhtémoc
- Cárdenas, García López de
- cardiac failure
- Cardigan Welsh corgi
- Cardigan, James Thomas Brudenell, 7th earl of
- cardinal flower
- carding
- Carducci, Bartolomeo
- Carducho, Bartolomeo
- Caregiving
- Carew, George, Baron Carew of Clopton and earl of Totnes
- Carey, Hugh Leo