pop out vs burst out

pop out and burst out both are verbs.

Word	Noun	Adjective	Verb	Adverb
pop out	No	No	Yes	No
burst out	No	No	Yes	No

As verbs, pop out and burst out are synonyms defined as:

pop out and burst out: appear suddenly or unexpectedly; happen unexpectedly

Other synonyms of pop out include crop up, pop, pop up.

pop out (verb)	burst out (verb)
come out suddenly or forcefully	erupt or intensify suddenly
exit briefly	give sudden release to an expression
bulge outward	appear suddenly or unexpectedly; happen unexpectedly
appear suddenly or unexpectedly; happen unexpectedly