Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun sleeper

9 senses of sleeper

Sense 1
sleeper, slumberer -- (a rester who is sleeping)
       => rester -- (a person who rests)

Sense 2
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)
       => spy, undercover agent -- ((military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors)
       => saboteur, wrecker, diversionist -- (someone who commits sabotage or deliberately causes wrecks)
       => terrorist -- (a radical who employs terror as a political weapon; usually organizes with other terrorists in small cells; often uses religion as a cover for terrorist activities)

Sense 3
sleeper -- (an unexpected achiever of success; "the winner was a true sleeper--no one expected him to get it")
       => achiever, winner, success, succeeder -- (a person with a record of successes; "his son would never be the achiever that his father was"; "only winners need apply"; "if you want to be a success you have to dress like a success")

Sense 4
tie, railroad tie, crosstie, sleeper -- (one of the cross braces that support the rails on a railway track; "the British call a railroad tie a sleeper")
       => brace, bracing -- (a structural member used to stiffen a framework)

Sense 5
sleeping car, sleeper, wagon-lit -- (a passenger car that has berths for sleeping)
       => passenger car, coach, carriage -- (a railcar where passengers ride)

Sense 6
sleeper -- (pajamas with feet; worn by children)
       => pajama, pyjama, pj's, jammies -- ((usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers)

Sense 7
sleeper -- (a piece of furniture that can be opened up into a bed)
       => furniture, piece of furniture, article of furniture -- (furnishings that make a room or other area ready for occupancy; "they had too much furniture for the small apartment"; "there was only one piece of furniture in the room")

Sense 8
sleeper, sleeper goby -- (tropical fish that resembles a goby and rests quietly on the bottom in shallow water)
       => percoid fish, percoid, percoidean -- (any of numerous spiny-finned fishes of the order Perciformes)

Sense 9
sleeper -- (an unexpected hit; "that movie was the sleeper of the summer")
       => hit, smash, smasher, strike, bang -- (a conspicuous success; "that song was his first hit and marked the beginning of his career"; "that new Broadway show is a real smasher"; "the party went with a bang")