feeder vs self-feeder

feeder and self-feeder both are nouns.

Word	Noun	Adjective	Verb	Adverb
feeder	Yes	No	No	No
self-feeder	Yes	No	No	No

As nouns, feeder and self-feeder are synonyms defined as:

feeder and self-feeder: a machine that automatically provides a supply of some material

feeder (noun)	self-feeder (noun)
an animal being fattened or suitable for fattening	a machine that automatically provides a supply of some material
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