hollow vs rabbit burrow

hollow and rabbit burrow both are nouns.

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

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

hollow (noun)	rabbit burrow (noun)
a depression hollowed out of solid matter	a hole in the ground as a nest made by wild rabbits
a small valley between mountains
a cavity or space in something

hollow (adjective)	rabbit burrow (adjective)
not solid; having a space or gap or cavity
lacking in substance or character
devoid of significance or force
as if echoing in a hollow space

hollow (verb)	rabbit burrow (verb)
remove the interior of
remove the inner part or the core of