sleeper vs strike

sleeper and strike both are nouns.

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

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

Other hypernyms of sleeper include bang, hit, smash, smasher.

sleeper (noun)	strike (noun)
an unexpected hit	a group's refusal to work in protest against low pay or bad work conditions
tropical fish that resembles a goby and rests quietly on the bottom in shallow water	a score in tenpins: knocking down all ten with the first ball
a passenger car that has berths for sleeping	an attack that is intended to seize or inflict damage on or destroy an objective
one of the cross braces that support the rails on a railway track	a conspicuous success
a piece of furniture that can be opened up into a bed	(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
pajamas with feet; worn by children	a gentle blow
a rester who is sleeping
an unexpected achiever of success
a spy or saboteur or terrorist planted in an enemy country who lives there as a law-abiding citizen until activated by a prearranged signal

sleeper (verb)	strike (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