strike vs onrush

strike and onrush both are nouns.

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

As nouns, onrush is a hypernym of strike; that is, onrush is a word with a broader meaning than strike:

strike: an attack that is intended to seize or inflict damage on or destroy an objective
onrush: (military) an offensive against an enemy (using weapons)

Other hypernyms of strike include attack, onset, onslaught.

strike (noun)	onrush (noun)
a group's refusal to work in protest against low pay or bad work conditions	(military) an offensive against an enemy (using weapons)
a score in tenpins: knocking down all ten with the first ball	a forceful forward rush or flow
an attack that is intended to seize or inflict damage on or destroy an objective
a conspicuous success
(baseball) a pitch that the batter swings at and misses, or that the batter hits into foul territory, or that the batter does not swing at but the umpire judges to be in the area over home plate and between the batter's knees and shoulders
a gentle blow

strike (verb)	onrush (verb)
cause to form (an electric arc) between electrodes of an arc lamp
arrive at after reckoning, deliberating, and weighing
indicate (a certain time) by striking
make a strategic, offensive, assault against an enemy, opponent, or a target
deliver a sharp blow, as with the hand, fist, or weapon
hit against; come into sudden contact with
affect or afflict suddenly, usually adversely
produce by manipulating keys or strings of musical instruments
remove by erasing or crossing out or as if by drawing a line
pierce with force
smooth with a strickle
hook by a pull on the line
produce by ignition or a blow
form by stamping, punching, or printing
disassemble a temporary structure, such as a tent or a theatrical set
have an emotional or cognitive impact upon
drive something violently into a location
occupy or take on
cause to experience suddenly
find unexpectedly
stop work in order to press demands
attain
touch or seem as if touching visually or audibly