trough vs feed bunk

trough and feed bunk both are nouns.

Word	Noun	Adjective	Verb	Adverb
trough	Yes	No	No	No
feed bunk	Yes	No	No	No

As nouns, feed bunk is a hyponym of trough; that is, feed bunk is a word with a more specific, narrower meaning than trough:

trough: a container (usually in a barn or stable) from which cattle or horses feed
feed bunk: a long trough for feeding cattle

Other hyponyms of trough include bunk.

trough (noun)	feed bunk (noun)
a channel along the eaves or on the roof; collects and carries away rainwater	a long trough for feeding cattle
a container (usually in a barn or stable) from which cattle or horses feed
a long narrow shallow receptacle
a narrow depression (as in the earth or between ocean waves or in the ocean bed)
a treasury for government funds
a concave shape with an open top