irrupt vs burst out

irrupt and burst out both are verbs.

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

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

Other synonyms of irrupt include break open, erupt, flare, flare up.

irrupt (verb)	burst out (verb)
increase rapidly and in an uncontrolled manner	erupt or intensify suddenly
erupt or intensify suddenly	give sudden release to an expression
enter uninvited	appear suddenly or unexpectedly; happen unexpectedly