rubbing vs rub

rubbing and rub both are nouns.

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

rubbing (noun)	rub (noun)
effort expended in moving one object over another with pressure	the act of rubbing or wiping
representation consisting of a copy (as of an engraving) made by laying paper over something and rubbing it with charcoal	an unforeseen obstacle
the resistance encountered when one body is moved in contact with another

rubbing (verb)	rub (verb)
	move over something with pressure
	cause friction
	scrape or rub as if to relieve itching