26 entries under unlooked-for topic. ×
| impetuous(adjective, sudden, unhoped) | |
| brusque(adjective, sudden, surprising) | |
| fast(adjective, sudden, surprising) | |
| hasty(adjective, sudden, unhoped) | |
| rapid(adjective, sudden, surprising) | |
| quick(adjective, sudden, surprising) | |
| swift(adjective, sudden, surprising) | |
| accelerated(adjective, sudden, unhoped) | |
| headlong(adjective, sudden, unhoped) | |
| hurried(adjective, sudden, unhoped) | |
| immediate(adjective, sudden, unhoped) | |
| rash(adjective, sudden, unhoped) | |
| rushing(adjective, sudden, unhoped) | |
| spontaneous(adjective, sudden, unhoped) | |
| urgent(adjective, sudden, unhoped) | |
| acute(adjective, sudden, unhoped) | |
| instant(adjective, sudden, unhoped) | |
| flashing(adjective, sudden, unhoped) | |
| fleeting(adjective, sudden, unhoped) | |
| instantaneous(adjective, sudden, unhoped) |
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| APA | Smart Define. (2015). out of the blue thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/out_of_the_blue/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "out of the blue thesaurus" https://smartdefine.org/out_of_the_blue/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2015, out of the blue thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/out_of_the_blue/thesaurus/synonyms>. |
| MLA | Smart Define. "out of the blue thesaurus" 3 August 2015. Web. 1 October 2026. <https://smartdefine.org/out_of_the_blue/thesaurus/synonyms> |