- Definitions|2
- Thesaurus|1.7k
- Abbreviations|0
167 entries under adjective topic. ×
| steep(sharp, sheer, vertical) | |
| eye-opening(amazing, astonishing, astounding, dumbfounding) | |
| impromptu(impulse, unexpected, quickly) | |
| out of the blue(expression, idiom, wonderful, abrupt) | |
| rushing(violent, fierce, quick, ardent) | |
| without warning(expression, adverb, wonderful, suddenly) | |
| absolute | |
| astonishing(extraordinary, wonderful, shocking, astounding) | |
| breakneck(keen, sharp, energetic, active) | |
| curt(keen, energetic, violent, active) | |
| electrifying(extraordinary, wonderful, affected, shocking) | |
| fleeting(quick, brief, immediate, instant) | |
| impatient(keen, energetic, violent, careless) | |
| instinctive(noun, passionate, violent, thoughtless) | |
| prompt(fast, quick, summary, speedy) | |
| spasmodic(unexpected, quickly) | |
| unpremeditated(noun, passionate, violent, careless) | |
| astounding | |
| automatic(thoughtless, impetuous, unwary) | |
| breathless(keen, violent, anxious, eager) |
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| APA | Smart Define. (2016). sudden thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/sudden/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sudden thesaurus" https://smartdefine.org/sudden/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, sudden thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/sudden/thesaurus/synonyms>. |
| MLA | Smart Define. "sudden thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/sudden/thesaurus/synonyms> |