Similar word to scoundrel:

bad news, black sheep, blackguard, caitiff, cheat, creep, crook, dastard, good-for-nothing, heel, imp, incorrigible, lowlife, maggot, mischiefmaker, miscreant, ne'er-do-well, rascal, reprobate, scalawag, scamp, thief, uncaring of others bad egg, vagabond, villain, wretch