feeder vs birdfeeder

feeder and birdfeeder both are nouns.

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

As nouns, feeder and birdfeeder are synonyms defined as:

feeder and birdfeeder: an outdoor device that supplies food for wild birds

Other synonyms of feeder include bird feeder.

feeder (noun)	birdfeeder (noun)
an animal being fattened or suitable for fattening	an outdoor device that supplies food for wild birds
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