knave
blackguard, bounder (old-fashioned Brit. slang) cheat, cocksucker (taboo slang) rapscallion, rascal, reprobate, rogue, rotter (slang, chiefly Brit.) scally (Northwest English dialect) scallywag (informal) scamp, scapegrace, scoundrel, scumbag (slang) swindler, varlet (archaic) villain