2
harebrained(adjective, knowledge, ability)
2
idiotic(adjective, knowledge, ability)
2
imbecilic(adjective, knowledge, ability, foolish)
2
jerky(adjective, knowledge, slang, ability)
2
loony(adjective, knowledge, ability, informal)
2
loopy(adjective, knowledge, ability, informal, foolish)
2
meshuga
2
meshugge
2
moronic(adjective, knowledge, ability)
2
nonsensical(adjective, knowledge, ability)
2
pinheaded
2
sappy(adjective, knowledge, slang, ability)
2
senseless
2
silly(adjective, knowledge, ability)
2
unbalanced
2
unintelligent
2
wacky(adjective, knowledge, slang, ability)
2
zany(adjective, knowledge, ability)
1
airheaded
1
birdbrained
12 years ago|7.5k views|share |citing 
APASmart Define. (2013). softheaded thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/softheaded/thesaurus/synonyms
ChicagoSmart Define. 2013. "softheaded thesaurus" https://smartdefine.org/softheaded/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2013, softheaded thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/softheaded/thesaurus/synonyms>.
MLASmart Define. "softheaded thesaurus" 17 October 2013. Web. 22 September 2026. <https://smartdefine.org/softheaded/thesaurus/synonyms>