burrow vs rabbit warren

burrow and rabbit warren both are nouns.

Word	Noun	Adjective	Verb	Adverb
burrow	Yes	No	Yes	No
rabbit warren	Yes	No	No	No

As nouns, rabbit warren is a hyponym of burrow; that is, rabbit warren is a word with a more specific, narrower meaning than burrow:

burrow: a hole made by an animal, usually for shelter
rabbit warren: a series of connected underground tunnels occupied by rabbits

Other hyponyms of burrow include warren.

burrow (noun)	rabbit warren (noun)
a hole made by an animal, usually for shelter	an overcrowded residential area
	a series of connected underground tunnels occupied by rabbits

burrow (verb)	rabbit warren (verb)
move through by or as by digging