contaminar - to contaminate, pollute; to corrupt

contar - to count, relate, tell

contener - to contain, hold

contestar - to answer

continuar - to continue

contribuir - to contribute

controlar - to control; to inspect, check

convencer - to convince

convenir - to agree; to suit, be suited to; to be good for

conversar - to talk, converse; to tell, relate

convertir - to convert