burn up vs burn

burn up is not a noun while burn is a noun.

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

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

Other hypernyms of burn up include combust.

As verbs, burn up and burn are synonyms defined as:

Other synonyms of burn up include burn off.

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

Other hypernyms of burn up include combust.

burn up (noun)	burn (noun)
	damage inflicted by fire
	a place or area that has been burned (especially on a person's body)
	pain that feels hot as if it were on fire
	an injury caused by exposure to heat or chemicals or radiation

burn up (verb)	burn (verb)
burn completely; be consumed or destroyed by fire	get a sunburn by overexposure to the sun
use up (energy)	undergo combustion
burn brightly	cause to undergo combustion
	destroy by fire
	damage by burning with heat, fire, or radiation
	burn, sear, or freeze (tissue) using a hot iron or electric current or a caustic agent
	use up (energy)
	create by duplicating data
	feel strong emotion, especially anger or passion
	cause a sharp or stinging pain or discomfort
	feel hot or painful
	spend (significant amounts of money)
	execute by tying to a stake and setting alight
	shine intensely, as if with heat
	cause to burn or combust