Synonyms for Sadism:

n.

bullying, maltreatment, Brutalities, barbarism, abuse, evil. fetishism, pedophilia, sexual abuse, bondage, bestiality, incest. perversion (noun)
masochism, sexual aberration, sexual abnormality, malice, cruelty, sadomasochism.
vice (noun)
degeneration, obnoxiousness, iniquitousness, villainousness, debasement, perverseness, criminality, sin, sinfulness, evildoing, debauchery, depravity, blameworthiness, immorality, vice, Damnability, blackness, badness, reprehensibleness, wickedness, indecency, impropriety, sinisterness, corruption, baseness, feloniousness, perversion.

Other synonyms:

sadomasochism, fetishism, pedophilia, incest. sexual abuse, bestiality, masochism, bondage. brutality
cruelty.
Other relevant words:
bullying, barbarism, Brutalities, pedophilia, maltreatment, bestiality, incest, evil, masochism, bondage, cruelty, malice, abuse, fetishism, sadomasochism.