bust up vs bust

bust up is not a noun while bust is a noun.

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

bust up (noun)	bust (noun)
	an occasion for excessive eating or drinking
	a sculpture of the head and shoulders of a person
	the chest of a woman
	a complete failure

bust up (adjective)	bust (adjective)
	lacking funds

bust up (verb)	bust (verb)
smash or break forcefully	break open or apart suddenly and forcefully
	go to pieces
	ruin completely
	separate or cause to separate abruptly
	search without warning, make a sudden surprise attack on