52 entries under adjective topic. ×
| rash(sudden, unlooked-for, unhoped) | |
| rushing(sudden, unlooked-for, unhoped) | |
| spontaneous(sudden, unlooked-for, unhoped) | |
| surprising(adverb, surprise, unexpected, unpredicted) | |
| unexpectedly(adverb, unpredictable, surprising, subitaneous) | |
| unplanned(adverb, surprise, unexpected, unprepared) | |
| urgent(sudden, unlooked-for, unhoped) | |
| without warning(expression, extraordinary, wonderful, surprise) | |
| acute(sudden, unlooked-for, unhoped) | |
| instant(sudden, unlooked-for, unhoped) | |
| flashing(sudden, unlooked-for, unhoped) | |
| fleeting(sudden, unlooked-for, unhoped) | |
| instantaneous(sudden, unlooked-for, unhoped) | |
| quickening(sudden, unlooked-for, unhoped) | |
| reckless(sudden, unlooked-for, unhoped) | |
| rushed(sudden, unlooked-for, unhoped) | |
| sharp(sudden, unlooked-for, unhoped) | |
| speedy(unpredictable, surprising, subitaneous) | |
| subito(surprise, unexpected, sudden) | |
| suddenly(adverb, surprising, not expected, not planned) |
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| APA | Smart Define. (2015). out of the blue thesaurus. Retrieved September 30, 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 September 30, 2026). |
| Harvard | Smart Define 2015, out of the blue thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/out_of_the_blue/thesaurus/synonyms>. |
| MLA | Smart Define. "out of the blue thesaurus" 3 August 2015. Web. 30 September 2026. <https://smartdefine.org/out_of_the_blue/thesaurus/synonyms> |