rub off vs rasp

rub off is not a noun while rasp is a noun.

Word	Noun	Adjective	Verb	Adverb
rub off	No	No	Yes	No
rasp	Yes	No	Yes	No

As verbs, rasp is a hyponym of rub off; that is, rasp is a word with a more specific, narrower meaning than rub off:

Other hyponyms of rub off include chafe, excoriate.

rub off (noun)	rasp (noun)
	a coarse file with sharp pointed projections
	uttering in an irritated tone

rub off (verb)	rasp (verb)
wear away	utter in a grating voice
	scrape with a rasp