rub vs chafe

rub and chafe both are nouns.

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

As verbs, rub and chafe are synonyms defined as:

Other synonyms of rub include fray, fret, scratch.

rub (noun)	chafe (noun)
the act of rubbing or wiping	anger produced by some annoying irritation
an unforeseen obstacle	soreness and warmth caused by friction

rub (verb)	chafe (verb)
move over something with pressure	warm by rubbing, as with the hands
cause friction	tear or wear off the skin or make sore by abrading
scrape or rub as if to relieve itching	cause friction
	cause annoyance in; disturb, especially by minor irritations
	feel extreme irritation or anger
	become or make sore by or as if by rubbing