feeder vs tributary

feeder and tributary both are nouns.

Word	Noun	Adjective	Verb	Adverb
feeder	Yes	No	No	No
tributary	Yes	Yes	No	No

As nouns, feeder and tributary are synonyms defined as:

Other synonyms of feeder include affluent, confluent.

feeder (noun)	tributary (noun)
an animal being fattened or suitable for fattening	a branch that flows into the main stream
an animal that feeds on a particular source of food
a machine that automatically provides a supply of some material
an outdoor device that supplies food for wild birds
a branch that flows into the main stream
someone who consumes food for nourishment

feeder (adjective)	tributary (adjective)
	tending to bring about; being partly responsible for
	paying tribute
	(of a stream) flowing into a larger stream