filter vs leach

filter and leach both are nouns.

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

As verbs, leach is a hyponym of filter; that is, leach is a word with a more specific, narrower meaning than filter:

Other hyponyms of filter include percolate.

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

filter (verb)	leach (verb)
remove by passing through a filter	remove substances from by a percolating liquid
pass through	permeate or penetrate gradually
run or flow slowly, as in drops or in an unsteady stream	cause (a liquid) to leach or percolate