92 entries under expression topic. ×
| unknown quantity(noun, idiom, doubt, doubtfulness) | |
| little known(adjective, obscure, strange, new) | |
| terra incognita(noun, idiom) | |
| unknown region(noun, idiom) | |
| dark horse(noun, idiom, possibility) | |
| under cover(obscure, dark, unseen) | |
| under wraps(clandestine, underground, undisclosed) | |
| au courant(adjective, unusual, strange, fresh) | |
| be born(verb, idiom) | |
| foreign body(alien, visitor, foreigner) | |
| from abroad(experience, distant, different, unfamiliar) | |
| frontiers of knowledge | |
| hundred-to-one shot(doubtfulness, underdog, sleeper, improbability) | |
| in a cloud | |
| in a fog | |
| in the dark(idiom, obscure, dark, hidden) | |
| in the wings | |
| itinerant person(alien, visitor, foreigner) | |
| just out(adjective, unusual, strange, fresh) | |
| life after death |
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| APA | Smart Define. (2015). unknown thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unknown/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unknown thesaurus" https://smartdefine.org/unknown/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, unknown thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unknown/thesaurus/synonyms>. |
| MLA | Smart Define. "unknown thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/unknown/thesaurus/synonyms> |