lech vs perve

lech and perve both are nouns.

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

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

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

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

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

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