126 entries under silly topic. ×

11
empty-headed(adjective, slight, ability, careless)
10
senseless(adjective, trivial)
10
whimsical(adjective, free, pleasant, smart, wild)
10
worthless(adjective, slight, lower, value, small)
9
harebrained(adjective, ability, careless, excited)
9
inane(adjective, slight, poor, careless, small)
9
playful(adjective, pleasant, keen, trivial)
9
puerile(adjective, slight, poor, stupid)
8
featherbrained(adjective, slight, ability, careless)
8
nugatory(adjective, slight, lower, value, small)
8
pointless(adjective, stupid, useless, trivial)
7
empty(adjective, slight, detail, small)
7
flip(adjective, pleasant, trivial, perky)
7
idiotic(adjective, trivial, imbecility folly)
7
niggling(adjective, slight, small, insignificant)
7
stupid(adjective, careless, crazy, vague)
6
facetious(adjective, trivial, kidding)
6
gay(adjective, pleasant, happy, trivial)
6
meaningless(adjective, mean, simple, slight, lower)
6
peripheral(adjective, slight, detail, trivial)
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APASmart Define. (2015). frivolous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/frivolous/thesaurus/synonyms
ChicagoSmart Define. 2015. "frivolous thesaurus" https://smartdefine.org/frivolous/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, frivolous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/frivolous/thesaurus/synonyms>.
MLASmart Define. "frivolous thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/frivolous/thesaurus/synonyms>