sleep vs sleeper

sleep and sleeper both are nouns.

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

sleep (noun)	sleeper (noun)
a natural and periodic state of rest during which consciousness of the world is suspended	an unexpected hit
euphemisms for death (based on an analogy between lying in a bed and in a tomb)	tropical fish that resembles a goby and rests quietly on the bottom in shallow water
a torpid state resembling deep sleep	a passenger car that has berths for sleeping
a period of time spent sleeping	one of the cross braces that support the rails on a railway track
	a piece of furniture that can be opened up into a bed
	pajamas with feet; worn by children
	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

sleep (verb)	sleeper (verb)
be asleep
be able to accommodate for sleeping