46 entries under casual topic. ×

22
thoughtless(adjective, careless, wild, foolish, stupid)
19
unthinking(adjective, dull, simple, wrong, slow)
18
heedless(adjective, careless, indifferent, wild, stupid)
14
unmindful(adjective, indifferent, stupid, careful)
13
careless(adjective, indifferent, wild, stupid, careful)
12
oblivious(adjective, careless, innocent, senseless)
10
forgetful(adjective, stupid, careful, senseless)
10
indifferent(careless, unconcerned, inattention, happy-go-lucky)
10
reckless(adjective, careless, indifferent, wild, stupid)
8
regardless(adjective, adverb, careless, indifferent, wild)
7
unheeding(adjective, indifferent, careful, unconcerned)
6
hasty(adjective, wild, thoughtless, negligent)
6
imprudent(adjective, careless, wild, stupid)
6
inconsiderate(adjective, indifferent, wild, thoughtless)
6
indiscreet(adjective, dull, wild, thoughtless)
6
injudicious(adjective, careless, foolish, stupid, unreasonable)
6
negligent(adjective, indifferent, wild, stupid)
5
cursory(inattention, happy-go-lucky, slapdash)
5
incautious(adjective, wild, thoughtless, happy-go-lucky)
5
unconcerned(adjective, indifferent, careful, happy-go-lucky)
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APASmart Define. (2015). mindless thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/mindless/thesaurus/synonyms
ChicagoSmart Define. 2015. "mindless thesaurus" https://smartdefine.org/mindless/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, mindless thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/mindless/thesaurus/synonyms>.
MLASmart Define. "mindless thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/mindless/thesaurus/synonyms>