affluent vs tributary

affluent and tributary both are nouns.

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

As nouns, affluent and tributary are synonyms defined as:

Other synonyms of affluent include confluent, feeder.

affluent (noun)	tributary (noun)
a branch that flows into the main stream	a branch that flows into the main stream
an affluent person; a person who is financially well off

affluent (adjective)	tributary (adjective)
having an abundant supply of money or possessions of value	tending to bring about; being partly responsible for
	paying tribute
	(of a stream) flowing into a larger stream