Preposition: of

• water: Its army, rising to battle, is an irresistible onrush of water, a fearsome sea, a raging.. ... .

Adjective modifier

• sudden: Kurious Orange The kick as sudden onrush of energy, the orgasmic seizure from which the word ' jazz ' was derived.

• general: Peaton residents have been acutely aware of being excluded from the the general onrush of broadband services being enjoyed elsewhere on the Peninsula.