1
half-baked
1
half-witted
1
heedless(adjective, careless, silly, unsteady, inconstant)
1
impulsive(lively, unpredictable, unreliable, changeable, erratic)
1
inconstant(adjective, careless, lively, active, unstable)
1
inept
1
insane
1
irregular(lively, unpredictable, changeable, temperamental, resilient)
1
irrepressible(lively, unpredictable, changeable, temperamental, resilient)
1
irresolute(adjective, careless, silly, unsteady, inconstant)
1
jerky
1
knuckleheaded
1
kooky
1
lamebrain
1
lighthearted(lively, unpredictable, changeable, temperamental, resilient)
1
lively(unpredictable, unreliable, changeable, erratic, resilient)
1
loony
1
lubricious(lively, unpredictable, changeable, temperamental)
1
lunatic
1
lunkheaded
13 years ago|6.7k views|share |citing 
APASmart Define. (2013). bubbleheaded thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/bubbleheaded/thesaurus/synonyms
ChicagoSmart Define. 2013. "bubbleheaded thesaurus" https://smartdefine.org/bubbleheaded/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2013, bubbleheaded thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/bubbleheaded/thesaurus/synonyms>.
MLASmart Define. "bubbleheaded thesaurus" 28 June 2013. Web. 21 September 2026. <https://smartdefine.org/bubbleheaded/thesaurus/synonyms>