1. (noun) sleeper, slumberer
a rester who is sleeping
Synonyms: slumberer, sleeper goby, crosstie, tie, sleeper, wagon-lit, railroad tie, sleeping car
2. (noun) sleeper
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
Synonyms: tie, sleeping car, railroad tie, slumberer, crosstie, wagon-lit, sleeper goby
3. (noun) sleeper
an unexpected achiever of success
Synonyms: tie, sleeping car, railroad tie, slumberer, crosstie, wagon-lit, sleeper goby
4. (noun) tie, railroad tie, crosstie, sleeper
one of the cross braces that support the rails on a railway track
Synonyms: crosstie, tie-up, standoff, sleeper, wagon-lit, linkup, necktie, tie, draw, tie-in, affiliation, link, sleeper goby, association, slumberer, sleeping car, railroad tie, tie beam
5. (noun) sleeping car, sleeper, wagon-lit
a passenger car that has berths for sleeping
Synonyms: sleeping car, sleeper goby, crosstie, tie, sleeper, wagon-lit, slumberer, railroad tie
6. (noun) sleeper
pajamas with feet; worn by children
Synonyms: tie, sleeping car, railroad tie, slumberer, crosstie, wagon-lit, sleeper goby
7. (noun) sleeper
a piece of furniture that can be opened up into a bed
Synonyms: tie, sleeping car, railroad tie, slumberer, crosstie, wagon-lit, sleeper goby
8. (noun) sleeper, sleeper goby
tropical fish that resembles a goby and rests quietly on the bottom in shallow water
Synonyms: slumberer, sleeper goby, crosstie, tie, sleeper, wagon-lit, railroad tie, sleeping car
9. (noun) sleeper
an unexpected hit
Synonyms: tie, sleeping car, railroad tie, slumberer, crosstie, wagon-lit, sleeper goby
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Synonyms for sleeper 
