47 entries under careless topic. ×

29
foolish(adjective, slight, silly, stupid)
24
flighty(noun, adjective, slight, ability)
21
giddy(noun, adjective, ability, informal)
16
dizzy(noun, adjective, slang, ability, informal)
16
scatterbrained(noun, adjective, ability, silly)
12
fickle(adjective, free, cold, wild)
11
empty-headed(adjective, slight, ability, silly)
9
capricious(adjective, free, wild, excited)
9
harebrained(adjective, ability, excited, silly)
9
inane(adjective, slight, poor, small)
8
featherbrained(adjective, slight, ability, silly)
7
erratic(adjective, unreasonable, impulsive, unpredictable)
7
stupid(adjective, silly, crazy, vague)
6
fitful(adjective, free, wild, changeable)
6
frothy(adjective, light, slight, lower, ability)
6
gaga(adjective, ability, informal, foolish)
6
irresponsible(adjective, excited, stupid, vague)
5
changeable(adjective, free, wild, excited)
4
brainless(adjective, simple, foolish, stupid)
3
crazy(silly, stupid, absurd, unthinking)
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APASmart Define. (2015). frivolous thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/frivolous/thesaurus/synonyms
ChicagoSmart Define. 2015. "frivolous thesaurus" https://smartdefine.org/frivolous/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, frivolous thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/frivolous/thesaurus/synonyms>.
MLASmart Define. "frivolous thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/frivolous/thesaurus/synonyms>