onrush - definition, thesaurus and related words from WordNet-Online

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Noun onrush has 2 senses

attack, onslaught, onset, onrush - (military) an offensive against an enemy (using weapons); "the attack began at dawn"
--₁ is a kind of operation, military operation
--₁ has parts: assault
--₁ has particulars:

ground attack; charge; banzai attack, banzai charge; diversion, diversionary attack; penetration, incursion; blitz; strike; counterattack, countermove; bombing, bombardment; fire, firing; strafe; surprise attack, coup de main

onrush - 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 onsrush of her thoughts"
--₂ is a kind of rush, spate, surge, upsurge