cansancio, m., weariness.
cansar, to weary, fatigue.
cantar, to sing.
cantidad, f., quantity, portion.
canto, m., song, singing.
caña, f., cane, reed.
capital, m., capital (money or stock).
capítulo, m., chapter.
caprichos-o, -a, capricious.
caprichud-o, -a, obstinate, stubborn.