Synonyms|394Antonyms|4|Broader|31Narrower|8Related|173
1
long shot(noun, expression, unknown, doubtfulness, underdog)
1
lookout(noun, plant, agent, operative, informer)
1
lotus
1
mail
1
meperidine
1
methadone
1
mole(noun, plant, agent, operative, informer)
1
monkey
1
morphia
1
morphine
1
nightgown(noun, dress)
1
nightwear
1
observer(noun, plant, agent, operative, informer)
1
operative(noun, plant, agent, mole, infiltrator)
1
opiate
1
opium
1
outrigger
1
outside chance(noun, expression, unknown, doubtfulness, underdog)
1
outside shot(noun, expression, unknown, doubtfulness, underdog)
1
pacifier
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APASmart Define. (2015). sleeper thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sleeper/thesaurus/synonyms
ChicagoSmart Define. 2015. "sleeper thesaurus" https://smartdefine.org/sleeper/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, sleeper thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sleeper/thesaurus/synonyms>.
MLASmart Define. "sleeper thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/sleeper/thesaurus/synonyms>