5
insane
5
light
5
stupid
5
whimsical(adjective, excited, unreliable, changeable, fearful)
5
witless(adjective, simple, slow, foolish, stupid)
4
absentminded(adjective, ignore, careless, forget, apathetic)
4
abstracted(adjective, ignore, careless, forget, remote)
4
asinine
4
changeable(adjective, careless, excited, stupid, unreliable)
4
dopey
4
flyaway
4
impulsive(adjective, capricious)
4
light-headed(adjective, silly, faint)
4
lightheaded(adjective, excited, silly, unreliable, changeable)
4
skittish(adjective, nervous)
4
unstable(careless, stupid, immoral, thoughtless, unreliable)
4
vacuous(adjective, simple, slow, stupid, boring)
4
volatile(adjective, capricious)
3
absent(adjective, ignore, careless, forget, apathetic)
3
absent-minded(adjective, careless, vague, out, distracted)
11 years ago|11k views|share |citing 
APASmart Define. (2015). scatterbrained thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/scatterbrained/thesaurus/synonyms
ChicagoSmart Define. 2015. "scatterbrained thesaurus" https://smartdefine.org/scatterbrained/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, scatterbrained thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/scatterbrained/thesaurus/synonyms>.
MLASmart Define. "scatterbrained thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/scatterbrained/thesaurus/synonyms>