| rough-and-ready | |
| senseless(adjective, insignificant, irregular, innocent, empty) | |
| shallow(adjective, extensive, chaotic, random, haphazard) | |
| simple(adjective, natural, casual, impulsive, willing) | |
| spontaneously | |
| superficial(adjective, extensive, chaotic, random, haphazard) | |
| sweeping(adjective, extensive, chaotic, random, haphazard) | |
| taken aback | |
| taken by surprise(expression, idiom) | |
| taken unawares | |
| temporary expedient | |
| thoughtless(adjective, careless, useless, erratic, frivolous) | |
| toss off(expression, free, casual, impulsive, spontaneous) | |
| toss out(expression, free, casual, impulsive, spontaneous) | |
| tossed off(expression, free, informal, casual, unprepared) | |
| tripped up | |
| unaffectedly | |
| unartful(adjective, simple, natural, casual, impulsive) | |
| unavoidable(adjective, simple, natural, casual, impulsive) | |
| unbegun |
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| APA | Smart Define. (2015). unplanned thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unplanned/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unplanned thesaurus" https://smartdefine.org/unplanned/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, unplanned thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unplanned/thesaurus/synonyms>. |
| MLA | Smart Define. "unplanned thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/unplanned/thesaurus/synonyms> |