144 entries under adjective topic. ×

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top secret(expression, sensitive, restricted, sub-rosa)
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unmoving(tranquil, silent, motionless, immobile)
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unobtrusive(close, quiet, soft, low)
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with a lid on(expression, idiom, sensitive, restricted)
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APASmart Define. (2013). buttoned up thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/buttoned_up/thesaurus/synonyms
ChicagoSmart Define. 2013. "buttoned up thesaurus" https://smartdefine.org/buttoned_up/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2013, buttoned up thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/buttoned_up/thesaurus/synonyms>.
MLASmart Define. "buttoned up thesaurus" 19 May 2013. Web. 21 September 2026. <https://smartdefine.org/buttoned_up/thesaurus/synonyms>