omnivore vs feeder

omnivore and feeder both are nouns.

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

As nouns, feeder is a hypernym of omnivore; that is, feeder is a word with a broader meaning than omnivore:

Other hypernyms of omnivore include eater.

omnivore (noun)	feeder (noun)
an animal that feeds on both animal and vegetable substances	an animal being fattened or suitable for fattening
a person who eats all kinds of foods	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