Synonyms for "lackbrained" (17 found)

Ranked by relevance and common usage.

Closest matches (4)

brainlessfoolishheadlessignorant

Strong matches (5)

ineptinsensateirrationalmindlesspea brained

Related words (8)

reasonlesssenselessunintelligentunreasoninguntalentedunthinkingunwisewitless

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.