carriage vs sleeper

carriage and sleeper both are nouns.

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

As nouns, sleeper is a hyponym of carriage; that is, sleeper is a word with a more specific, narrower meaning than carriage:

carriage (noun)	sleeper (noun)
a vehicle with wheels drawn by one or more horses	an unexpected hit
a railcar where passengers ride	tropical fish that resembles a goby and rests quietly on the bottom in shallow water
a machine part that carries something else	a passenger car that has berths for sleeping
a small vehicle with four wheels in which a baby or child is pushed around	one of the cross braces that support the rails on a railway track
characteristic way of bearing one's body	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