#1 onslaught n. a sudden and severe onset of trouble. wn
#2 onslaught n. [attack, onset, onrush] (military) an offensive against an enemy (using weapons); "the attack began at dawn". wn
#3 onslaught n. [barrage, bombardment, outpouring] the rapid and continuous delivery of linguistic communication (spoken or written); "a barrage of questions"; "a bombardment of mail complaining about his mistake". wn
vizzz