eater vs feeder

eater and feeder both are nouns.

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

As nouns, eater and feeder are synonyms defined as:

eater (noun)	feeder (noun)
any green goods that are good to eat	an animal being fattened or suitable for fattening
someone who consumes food for nourishment	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