59 entries under adjective topic. ×

2
faint
2
fickle(careless, foolish, unstable, faint)
2
zany
1
absurd
1
apish
1
asinine
1
bubbleheaded(careless, unstable, unreliable, changeable)
1
careless(wild, stupid, vague, unthinking)
1
changeable(careless, wild, foolish, stupid)
1
ditzy(careless, inconstant, giddy)
1
fair
1
flippant
1
inane
1
inconstant(careless, unstable, unreliable, changeable)
1
lighthearted
1
preposterous
1
ridiculous
1
sappy
1
slaphappy
1
unreasonable
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APASmart Define. (2015). featherbrained thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/featherbrained/thesaurus/synonyms
ChicagoSmart Define. 2015. "featherbrained thesaurus" https://smartdefine.org/featherbrained/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, featherbrained thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/featherbrained/thesaurus/synonyms>.
MLASmart Define. "featherbrained thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/featherbrained/thesaurus/synonyms>