75 entries under expression topic. ×
| not prepared(unqualified, unsuspecting, unready) | |
| not ready(unqualified, unsuspecting, unready) | |
| not rehearsed | |
| off the hip(idiom, impromptu, extemporaneous) | |
| off your own bat(idiom, willing, unforced) | |
| on the house(idiom, free, gratis) | |
| raving mad | |
| spur of the moment(idiom, free, casual, extemporaneous) | |
| taken off guard(idiom, unqualified, unsuspecting, unready) | |
| thrown off(unprepared, unplanned, unrehearsed) | |
| uncalled for(willing, voluntary) | |
| without compulsion | |
| without consideration | |
| without preparation(impromptu, extemporaneous) | |
| without restraint(informal, unplanned, extemporize, off-the-cuff) |
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| APA | Smart Define. (2015). spontaneous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/spontaneous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "spontaneous thesaurus" https://smartdefine.org/spontaneous/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, spontaneous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/spontaneous/thesaurus/synonyms>. |
| MLA | Smart Define. "spontaneous thesaurus" 3 August 2015. Web. 24 September 2026. <https://smartdefine.org/spontaneous/thesaurus/synonyms> |