onrush vs assault

onrush and assault both are nouns.

Word	Noun	Adjective	Verb	Adverb
onrush	Yes	No	No	No
assault	Yes	No	Yes	No

onrush (noun)	assault (noun)
(military) an offensive against an enemy (using weapons)	close fighting during the culmination of a military attack
a forceful forward rush or flow	a threatened or attempted physical attack by someone who appears to be able to cause bodily harm if not stopped
	the crime of forcing a person to submit to sexual intercourse against his or her will

onrush (verb)	assault (verb)
	attack in speech or writing
	attack someone physically or emotionally
	force (someone) to have sex against their will