burn off vs use up

burn off and use up both are verbs.

Word	Noun	Adjective	Verb	Adverb
burn off	No	No	Yes	No
use up	No	No	Yes	No

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

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

burn off (verb)	use up (verb)
clear land of its vegetation by burning it off	use up (resources or materials)
use up (energy)	require (time or space)