feeder vs eater

feeder and eater both are nouns.

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

As nouns, feeder and eater are synonyms defined as:

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