Synonyms|558Antonyms|116|Broader|11Narrower|9Related|411

82 entries under expression topic. ×

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behind a screen(idiom, concealment)
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below grade
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bottom panel
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bottom plating
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by implication(idiom, latency implication)
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by inference(idiom, latency implication)
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by stealth
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channel bed
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channel bottom
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cloak and dagger(idiom, hidden, fraudulent)
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collaborators of enemy(noun, idiom, subway, subversives)
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communicated covertly
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deep seated(idiom, depth)
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deeper meaning
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dug in
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electric resistance
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electrical resistance
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electron tube
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in a haze(idiom, concealment)
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in a mist(idiom, concealment)
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APASmart Define. (2015). underground thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/underground/thesaurus/synonyms
ChicagoSmart Define. 2015. "underground thesaurus" https://smartdefine.org/underground/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, underground thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/underground/thesaurus/synonyms>.
MLASmart Define. "underground thesaurus" 3 November 2015. Web. 21 September 2026. <https://smartdefine.org/underground/thesaurus/synonyms>