sap vs cave

sap and cave both are nouns.

Word	Noun	Adjective	Verb	Adverb
sap	Yes	No	Yes	No
cave	Yes	No	Yes	No

As verbs, cave is a hypernym of sap; that is, cave is a word with a broader meaning than sap:

Other hypernyms of sap include undermine.

sap (noun)	cave (noun)
a piece of metal covered by leather with a flexible handle; used for hitting people	a geological formation consisting of an underground enclosure with access from the surface of the ground or from the sea
a person who lacks good judgment
a watery solution of sugars, salts, and minerals that circulates through the vascular system of a plant

sap (verb)	cave (verb)
excavate the earth beneath	explore natural caves
deplete	hollow out as if making a cave or opening