bust vs come apart

bust is a noun but come apart is not a noun.

Word	Noun	Adjective	Verb	Adverb
bust	Yes	Yes	Yes	No
come apart	No	No	Yes	No

As verbs, come apart is a hypernym of bust; that is, come apart is a word with a broader meaning than bust:

Other hypernyms of bust include break, fall apart, separate, split up.

bust (noun)	come apart (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 (adjective)	come apart (adjective)
lacking funds

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