burst vs split up

burst and split up both are nouns.

Word	Noun	Adjective	Verb	Adverb
burst	Yes	No	Yes	No
split up	Yes	No	Yes	No

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

Other hypernyms of burst include break, come apart, fall apart, separate.

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

Other hypernyms of burst include break, come apart, fall apart, separate.

burst (noun)	split up (noun)
the act of exploding or bursting	an increase in the number of outstanding shares of a corporation without changing the shareholders' equity
rapid simultaneous discharge of firearms
a sudden flurry of activity (often for no obvious reason)
a sudden intense happening

burst (verb)	split up (verb)
come open suddenly and violently, as if from internal pressure	become separated into pieces or fragments
break open or apart suddenly and forcefully	get a divorce; formally terminate a marriage
emerge suddenly	discontinue an association or relation; go different ways
burst outward, usually with noise	separate into parts or portions
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