| free(adjective, informal, casual, spontaneous, unprepared) | |
| go off half-cocked(expression, idiom) | |
| haphazard | |
| hasty | |
| have no plan(expression, idiom) | |
| immediate(adjective, free, informal, casual, snap) | |
| improvisate | |
| improvisation | |
| improvisatorial | |
| improvisatory(adjective, free, informal, casual, snap) | |
| improvision | |
| incapability | |
| incompetence | |
| informal(adjective, free, casual, snap, unprepared) | |
| jamming(adjective, free, informal, casual, snap) | |
| jury-rig | |
| jury-rigged | |
| knock off | |
| lack of preparation(expression, idiom) | |
| lash up |
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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> |