feeder vs diner

feeder and diner both are nouns.

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

As nouns, diner is a hyponym of feeder; that is, diner is a word with a more specific, narrower meaning than feeder:

feeder (noun)	diner (noun)
an animal being fattened or suitable for fattening	a passenger car where food is served in transit
an animal that feeds on a particular source of food	a restaurant that resembles a dining car
a machine that automatically provides a supply of some material	a person eating a meal (especially in a restaurant)
an outdoor device that supplies food for wild birds
a branch that flows into the main stream
someone who consumes food for nourishment