responder - to respond, answer, reply to
resultar - to turn out (to be), prove [to be], ensue
revelar - to reveal, disclose; to develop [film]
rezar - to pray
robar - to rob, steal, burgle, break into
rogar - to plead, beg, ask for
romper - to break
rabiar - to rage
racionar - to ration
racionalizar - to rationalize
radicalizar - to radicalize, to intensify