This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A violent attack.

n. An overwhelming outpouring: an onslaught of third-class mail.

n. A fierce attack.

n. A large quantity of people or things resembling an attack.

n. An attack; an onset; esp., a furious or murderous attack or assault.

n. A bloody fray or battle.

n. Attack; onset; aggression; assault; an inroad; an incursion; a bloody attack.

n. Synonyms Assault, etc. See onset.

n. the rapid and continuous delivery of linguistic communication (spoken or written)

n. (military) an offensive against an enemy (using weapons)

n. a sudden and severe onset of trouble

"An angry Mr. Kasich tells me that this onslaught is the way it's been from the Strickland campaign for 14 straight months."

linguistic communication    language    trouble   

slew   

attack    onset    rush   

barrage    assault    bombardment    onset    cannonade    outburst    horde    assailant    torrent    surge