down vs strike

down and strike both are nouns.

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

As verbs, strike is a hypernym of down; that is, strike is a word with a broader meaning than down:

down (noun)	strike (noun)
(American football) a complete play to advance the football	a group's refusal to work in protest against low pay or bad work conditions
soft fine feathers	a score in tenpins: knocking down all ten with the first ball
fine soft dense hair (as the fine short hair of cattle or deer or the wool of sheep or the undercoat of certain dogs)	an attack that is intended to seize or inflict damage on or destroy an objective
(usually plural) a rolling treeless highland with little soil	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

down (adjective)	strike (adjective)
being or moving lower in position or less in some value
filled with melancholy and despondency
extending or moving from a higher to a lower place
becoming progressively lower
not functioning (temporarily or permanently)
lower than previously
shut
being put out in a game of baseball
understood perfectly

down (verb)	strike (verb)
improve or perfect by pruning or polishing	cause to form (an electric arc) between electrodes of an arc lamp
bring down or defeat (an opponent)	arrive at after reckoning, deliberating, and weighing
drink down entirely	indicate (a certain time) by striking
eat up completely, as with great appetite	make a strategic, offensive, assault against an enemy, opponent, or a target
cause to come or go down	deliver a sharp blow, as with the hand, fist, or weapon
shoot at and force to come down	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

down (adverb)	strike (adverb)
spatially or metaphorically from a higher to a lower level or position
away from a more central or a more northerly place
paid in cash at time of purchase
in an inactive or inoperative state
to a lower intensity
from an earlier time