castizo, -a, chaste, noble; racy; idiomatic

casto, -a, chaste

casualidad, chance

catalán, -ana, Catalan, pertaining to Spanish province of Catalonia

Catamarca, province of Argentina, V. map

catarata, falls

catástrofe, f., catastrophe, death

cátedra, class, chair

categoría, rank, category

catolicismo, catholicism