lecherous vs sex

lecherous is not a noun while sex is a noun.

Word	Noun	Adjective	Verb	Adverb
lecherous	No	Yes	No	No
sex	Yes	No	Yes	No

lecherous (noun)	sex (noun)
	activities associated with sexual intercourse
	the properties that distinguish organisms on the basis of their reproductive roles
	all of the feelings resulting from the urge to gratify sexual impulses
	either of the two categories (male or female) into which most organisms are divided

lecherous (adjective)	sex (adjective)
given to excessive indulgence in sexual activity

lecherous (verb)	sex (verb)
	tell the sex (of young chickens)
	to evoke sexual feelings