letch vs perve

letch and perve both are nouns.

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

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

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

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

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

letch (verb)	perve (verb)
	look at with amorous intentions