76 entries under idiom topic. ×
| by implication(expression, latency implication) | |
| by inference(expression, latency implication) | |
| by stealth | |
| channel bed | |
| channel bottom | |
| cloak and dagger(expression, hidden, fraudulent) | |
| collaborators of enemy(noun, expression, subway, subversives) | |
| communicated covertly | |
| deep seated(expression, depth) | |
| deeper meaning | |
| electric resistance | |
| electrical resistance | |
| electron tube | |
| in a haze(expression, concealment) | |
| in a mist(expression, concealment) | |
| in disguise(expression, concealment) | |
| in hiding(expression, concealment) | |
| in holes and corners(expression, hidden, fraudulent) | |
| in the shade(expression, concealment) | |
| not expressed |
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| APA | Smart Define. (2015). underground thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/underground/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "underground thesaurus" https://smartdefine.org/underground/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, underground thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/underground/thesaurus/synonyms>. |
| MLA | Smart Define. "underground thesaurus" 3 November 2015. Web. 25 September 2026. <https://smartdefine.org/underground/thesaurus/synonyms> |