varlet

villainess

blackguard

criminal, crook, culprit, felon, lawbreaker, malefactor, offender, perp, perpetrator, transgressor

sinner, trespasser, wrongdoer

cad, heel, serpent, snake, viper

bandit, bravo, desperado, outlaw

con, convict, jailbird

assassin, cutthroat, gangster, goon, gunman, hoodlum, hooligan, racketeer, ruffian, thug

rough, rowdy, tough

loser, lowlife, ne'er-do-well, stinker, trash