letch vs deviant

letch and deviant both are nouns.

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

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

letch: man with strong sexual desires
deviant: a person whose behavior deviates from what is acceptable especially in sexual behavior

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

letch (noun)	deviant (noun)
man with strong sexual desires	a person whose behavior deviates from what is acceptable especially in sexual behavior

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