file vs rub

file and rub both are nouns.

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

file (noun)	rub (noun)
a steel hand tool with small sharp teeth on some or all of its surfaces; used for smoothing wood or metal	the act of rubbing or wiping
office furniture consisting of a container for keeping papers in order	an unforeseen obstacle
a set of related records (either written or electronic) kept together
a line of persons or things ranged one behind the other

file (verb)	rub (verb)
place in a container for keeping records	move over something with pressure
file a formal charge against	cause friction
record in a public office or in a court of law	scrape or rub as if to relieve itching
smooth with a file
proceed in line