hole up vs hide out

hole up and hide out both are verbs.

Word	Noun	Adjective	Verb	Adverb
hole up	No	No	Yes	No
hide out	No	No	Yes	No

As verbs, hide out is a hypernym of hole up; that is, hide out is a word with a broader meaning than hole up:

hole up: remain secluded or in hiding
hide out: be or go into hiding; keep out of sight, as for protection and safety

Other hypernyms of hole up include hide.

hole up (verb)	hide out (verb)
sleep during winter	be or go into hiding; keep out of sight, as for protection and safety
score a hole in one
remain secluded or in hiding