The Collaborative International Dictionary of English v.0.48:
evildoer \e"vil*do`er\ n. a person who performs an evil deed; one who sins (without repenting). Syn: sinner. [WordNet 1.5]WordNet (r) 3.0 (2006):
evildoer n 1: a person who sins (without repenting) [syn: sinner, evildoer]