spend vs use up

spend and use up both are verbs.

Word	Noun	Adjective	Verb	Adverb
spend	No	No	Yes	No
use up	No	No	Yes	No

As verbs, use up is a hypernym of spend; that is, use up is a word with a broader meaning than spend:

Other hypernyms of spend include consume, deplete, eat, eat up, exhaust, expend, run through, use, wipe out, pay.

As verbs, use up is a hypernym of spend; that is, use up is a word with a broader meaning than spend:

Other hypernyms of spend include consume, deplete, eat, eat up, exhaust, expend, run through, use, wipe out.

spend (verb)	use up (verb)
pay out	use up (resources or materials)
spend completely	require (time or space)
use up a period of time in a specific way