burst vs fall apart

burst is a noun but fall apart is not a noun.

Word	Noun	Adjective	Verb	Adverb
burst	Yes	No	Yes	No
fall apart	No	No	Yes	No

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

Other hypernyms of burst include break, come apart, separate, split up.

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

Other hypernyms of burst include break, come apart, separate, split up.

burst (noun)	fall apart (noun)
the act of exploding or bursting
rapid simultaneous discharge of firearms
a sudden flurry of activity (often for no obvious reason)
a sudden intense happening

burst (verb)	fall apart (verb)
come open suddenly and violently, as if from internal pressure	become separated into pieces or fragments
break open or apart suddenly and forcefully	break or fall apart into fragments
emerge suddenly	go to pieces
burst outward, usually with noise	lose one's emotional or mental composure
force out or release suddenly and often violently something pent up
move suddenly, energetically, or violently
cause to burst
be in a state of movement or action