| made-up(adjective, adverb, free, informal, snap) | |
| measure | |
| nonpreparation | |
| nonpreparedness | |
| off top of head(expression, adjective, idiom, adverb, simple) | |
| on-the-spot(adjective, free, informal, casual, snap) | |
| on impulse(expression, adjective, free, informal, casual) | |
| on sight | |
| out of hand(expression, idiom) | |
| planlessness | |
| playing by ear(expression, idiom) | |
| precipitate | |
| prefab(verb, make, create, prepare, discover) | |
| pro tempore | |
| rough-and-ready | |
| scrap the plan(expression, idiom) | |
| shot from the hip(expression, adjective, idiom, fake, mock) | |
| speak off-the-cuff | |
| speak unpreparedly | |
| spur of the moment(expression, adjective, idiom, adverb, mock) |
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| APA | Smart Define. (2015). ad lib thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/ad_lib/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "ad lib thesaurus" https://smartdefine.org/ad_lib/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, ad lib thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/ad_lib/thesaurus/synonyms>. |
| MLA | Smart Define. "ad lib thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/ad_lib/thesaurus/synonyms> |