outpouring vs onslaught

outpouring and onslaught both are nouns.

Word	Noun	Adjective	Verb	Adverb
outpouring	Yes	No	No	No
onslaught	Yes	No	No	No

As nouns, outpouring and onslaught are synonyms defined as:

outpouring and onslaught: the rapid and continuous delivery of linguistic communication (spoken or written)

Other synonyms of outpouring include barrage, bombardment.

outpouring (noun)	onslaught (noun)
a large flow	(military) an offensive against an enemy (using weapons)
the rapid and continuous delivery of linguistic communication (spoken or written)	the rapid and continuous delivery of linguistic communication (spoken or written)
the pouring forth of a fluid	a sudden and severe onset of trouble
a sudden rapid flow (as of water)
a natural flow of ground water