sleepers

1. a rester who is sleepingSynonyms: sleeper, slumberer

2. a spy or saboteur or terrorist planted in an enemy country who lives there as a law-abiding citizen until activated by a prearranged signalSynonyms: sleeper

3. an unexpected achiever of successExamples: "the winner was a true sleeper--no one expected him to get it"Synonyms: sleeper

4. one of the cross braces that support the rails on a railway trackExamples: "the British call a railroad tie a sleeper"Synonyms: crosstie, railroad tie, sleeper, tie

5. a passenger car that has berths for sleepingSynonyms: sleeper, sleeping car, wagon-lit

6. pajamas with feet; worn by childrenSynonyms: sleeper