belly-up vs bankrupt

belly-up is not a noun while bankrupt is a noun.

Word	Noun	Adjective	Verb	Adverb
belly-up	No	Yes	No	No
bankrupt	Yes	Yes	Yes	No

As adjectives, belly-up and bankrupt are synonyms defined as:

belly-up (noun)	bankrupt (noun)
	someone who has insufficient assets to cover their debts

belly-up (adjective)	bankrupt (adjective)
financially ruined	financially ruined

belly-up (verb)	bankrupt (verb)
	reduce to bankruptcy