sadist vs deviant

sadist and deviant both are nouns.

Word	Noun	Adjective	Verb	Adverb
sadist	Yes	No	No	No
deviant	Yes	Yes	No	No

As nouns, deviant is a hypernym of sadist; that is, deviant is a word with a broader meaning than sadist:

sadist: someone who obtains pleasure from inflicting pain on others
deviant: a person whose behavior deviates from what is acceptable especially in sexual behavior

Other hypernyms of sadist include degenerate, deviate, perv, perve, pervert.

sadist (noun)	deviant (noun)
someone who obtains pleasure from inflicting pain on others	a person whose behavior deviates from what is acceptable especially in sexual behavior

sadist (adjective)	deviant (adjective)
	markedly different from an accepted norm