infiltrate vs filter

infiltrate is not a noun while filter is a noun.

Word	Noun	Adjective	Verb	Adverb
infiltrate	No	No	Yes	No
filter	Yes	No	Yes	No

As verbs, filter is a hypernym of infiltrate; that is, filter is a word with a broader meaning than infiltrate:

Other hypernyms of infiltrate include percolate, permeate, sink in.

As verbs, filter is a hypernym of infiltrate; that is, filter is a word with a broader meaning than infiltrate:

Other hypernyms of infiltrate include percolate, permeate, sink in.

infiltrate (noun)	filter (noun)
	device that removes something from whatever passes through it
	an electrical device that alters the frequency spectrum of signals passing through it

infiltrate (verb)	filter (verb)
pass through an enemy line; in a military conflict	remove by passing through a filter
cause (a liquid) to enter by penetrating the interstices	pass through
pass into or through by filtering or permeating	run or flow slowly, as in drops or in an unsteady stream
enter a group or organization in order to spy on the members