Synonyms|78Antonyms|0|Broader|4Narrower|0Related|41
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secret service
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sentinel
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sentry
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signal
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signal post(expression, idiom, warning)
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snooper
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spial
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t-man
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tribune
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ulema
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undercover
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vedette
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ward
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watch
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watch and ward(expression, idiom, warning)
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watchdog
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watchman
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watchtower
11 years ago|674 views|share |citing 
APASmart Define. (2015). plainclothesman thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/plainclothesman/thesaurus/synonyms
ChicagoSmart Define. 2015. "plainclothesman thesaurus" https://smartdefine.org/plainclothesman/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, plainclothesman thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/plainclothesman/thesaurus/synonyms>.
MLASmart Define. "plainclothesman thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/plainclothesman/thesaurus/synonyms>