effusion vs outburst

effusion and outburst both are nouns.

Word	Noun	Adjective	Verb	Adverb
effusion	Yes	No	No	No
outburst	Yes	No	No	No

As nouns, effusion and outburst are synonyms defined as:

Other synonyms of effusion include blowup, ebullition, gush.

effusion (noun)	outburst (noun)
flow under pressure	a sudden violent disturbance
an unrestrained expression of emotion	an unrestrained expression of emotion
	a sudden intense happening