1) Barbarian 2) Corporal punisher 3) Cruel fellow 4) Cruel one 5) Cruel pleasure seeker 6) Cruel sort 7) Cruel type 8) Degenerate 9) Deviant 10) Deviate 11) Exemplar of cruelty 12) Happily humiliating type 13) He gets his kicks from kicks 14) He likes to strike 15) Inhumane person 16) Meanie 17) One into pain management Found on https://www.crosswordclues.com/clue/sadist