core out vs cavern out

core out and cavern out both are verbs.

Word	Noun	Adjective	Verb	Adverb
core out	No	No	Yes	No
cavern out	No	No	Yes	No

As verbs, cavern out is a hyponym of core out; that is, cavern out is a word with a more specific, narrower meaning than core out:

Other hyponyms of core out include gouge, rout, scallop, scollop, hole, draw in, suck in, scoop out, cavern, cave, undermine, dig, dig out, excavate, core.

core out (verb)	cavern out (verb)
remove the interior of	hollow out as if making a cavern