- Definitions|3
- Thesaurus|2.9k
- Abbreviations|0
| vacuous | |
| arbitrary(adjective, chance, changeable, uninformed, indecisive) | |
| absurd | |
| birdbrained(adjective, slang, ability) | |
| crazy(careless, silly, stupid, absurd, unthinking) | |
| fluffy | |
| flyaway | |
| ill-advised(silly, crazy, wacky, imbecility folly) | |
| impulsive(adjective, silly, crazy, unreliable, changeable) | |
| inconstant(adjective, free, careless, wild, unstable) | |
| indecisive(adjective, changeable, erratic, pointless, haphazard) | |
| irrational(adjective, simple, foolish, stupid, crazy) | |
| laughable | |
| light-headed(adjective, silly, faint) | |
| light-minded(adjective, silly, trivial) | |
| lighthearted(adjective, ability) | |
| measly(adjective, slight, small, insignificant, unimportant) | |
| otiose(adjective, slight, useless, trivial, empty) | |
| picayune(adjective, mean, slight, lower, value) | |
| puny(adjective, mean, weak, soft, slight) |
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| APA | Smart Define. (2015). frivolous thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/frivolous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "frivolous thesaurus" https://smartdefine.org/frivolous/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, frivolous thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/frivolous/thesaurus/synonyms>. |
| MLA | Smart Define. "frivolous thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/frivolous/thesaurus/synonyms> |