rub vs sex

rub and sex both are nouns.

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

rub (noun)	sex (noun)
the act of rubbing or wiping	activities associated with sexual intercourse
an unforeseen obstacle	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

rub (verb)	sex (verb)
move over something with pressure	tell the sex (of young chickens)
cause friction	to evoke sexual feelings
scrape or rub as if to relieve itching