rub vs snag

rub and snag both are nouns.

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

As nouns, rub and snag are synonyms defined as:

Other synonyms of rub include hang-up, hitch.

rub (noun)	snag (noun)
the act of rubbing or wiping	an unforeseen obstacle
an unforeseen obstacle	an opening made forcibly as by pulling apart
	a dead tree that is still standing, usually in an undisturbed forest
	a sharp protuberance

rub (verb)	snag (verb)
move over something with pressure	catch on a snag
cause friction	hew jaggedly
scrape or rub as if to relieve itching	get by acting quickly and smartly