hibernate vs catch some Z's

hibernate and catch some Z's both are verbs.

Word	Noun	Adjective	Verb	Adverb
hibernate	No	No	Yes	No
catch some Z's	No	No	Yes	No

As verbs, catch some Z's is a hypernym of hibernate; that is, catch some Z's is a word with a broader meaning than hibernate:

Other hypernyms of hibernate include kip, log Z's, sleep, slumber.

hibernate (verb)	catch some Z's (verb)
sleep during winter	be asleep
be in an inactive or dormant state