file in vs file

file in is not a noun while file is a noun.

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

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

file in (verb)	file (verb)
enter by marching in a file	place in a container for keeping records
	file a formal charge against
	record in a public office or in a court of law
	smooth with a file
	proceed in line