filter vs trickle

filter and trickle both are nouns.

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

As verbs, filter and trickle are synonyms defined as:

filter and trickle: run or flow slowly, as in drops or in an unsteady stream

Other synonyms of filter include dribble.

filter (noun)	trickle (noun)
device that removes something from whatever passes through it	flowing in drops; the formation and falling of drops of liquid
an electrical device that alters the frequency spectrum of signals passing through it

filter (verb)	trickle (verb)
remove by passing through a filter	run or flow slowly, as in drops or in an unsteady stream
pass through
run or flow slowly, as in drops or in an unsteady stream