onrush

nouns

(military) an offensive against an enemy (using weapons)
"the attack began at dawn"
attack, onrush, onset, onslaught
a forceful forward rush or flow
"from the bow she stared at the mesmerising onrush of the sea where it split and foamed"; "the explosion interrupted the wild onrush of her thoughts"
onrush
is a type of (narrower)
a sudden forceful flow
rush, spate, surge, upsurge