1
insensible(cold, dead, unconcerned, senseless, ignorant)
1
insufficient(inadequate, useless, inept, unable, unskilled)
1
irrational(adjective, silly, foolish, unstable, disturbed)
1
irreflective(rash, oblivious, neglectful)
1
kinky(adjective, unstable, disturbed, unhinged)
1
lax(adjective, careless, vague, sloppy, slack)
1
like an absent-minded professor(expression, adjective, idiom, careless, sloppy)
1
listless(adjective, careless, indifferent, apathetic, distracted)
1
looking out window(expression, adjective, idiom, careless, sloppy)
1
loopy
1
loser(dull, unintelligent, witless, ill-starred, voodooed)
1
lost(adjective, careless, indifferent, apathetic, remote)
1
ludicrous(dull, silly, foolish, unwise, unintelligent)
1
maladroit(inadequate, useless, inept, unable, unskilled)
1
mindless(dull, unintelligent, witless)
1
misled(distracted, dazed, disorganized, perturbed, perplexed)
1
mixed up(expression, distracted, untidy, disorganized, perturbed)
1
moonstruck(silly, foolish, mad, insane, unwise)
1
moony(adjective, careless, remote, vague, sloppy)
1
muddle-headed(adjective, confused, frantic, untidy, hacked)
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APASmart Define. (2013). out to lunch thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/out_to_lunch/thesaurus/synonyms
ChicagoSmart Define. 2013. "out to lunch thesaurus" https://smartdefine.org/out_to_lunch/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2013, out to lunch thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/out_to_lunch/thesaurus/synonyms>.
MLASmart Define. "out to lunch thesaurus" 17 May 2013. Web. 29 September 2026. <https://smartdefine.org/out_to_lunch/thesaurus/synonyms>