44 entries under casual topic. ×

17
heedless(noun, adjective, careless, cold, indifferent)
15
careless(noun, adjective, cold, indifferent, foolish)
14
unmindful(noun, adjective, careless, cold, indifferent)
11
negligent(noun, adjective, careless, cold)
11
unheeding(verb, adjective, careless, cold, careful)
10
regardless(adjective, adverb, careless, cold, foolish)
9
absent-minded(noun, adjective, careless, cold, foolish)
9
inadvertent(adjective, careless, cold, foolish, stupid)
9
thoughtless(adjective, careless, cold, indifferent, foolish)
8
oblivious(noun, adjective, careless, indifferent)
6
remiss(noun, adjective, careless, cold, foolish)
5
inconsiderate(adjective, cold, indifferent, forget)
5
indifferent(noun, adjective, careless, apathetic)
5
unthinking(adjective, careless, indifferent, foolish, stupid)
4
mindless(adjective, careless, stupid, careful)
3
unconcerned(noun, adjective, careful, happy-go-lucky)
2
abstracted(noun, adjective, careless, thoughtless)
2
cursory(inattention, happy-go-lucky, slapdash)
2
disregardful(rash, happy-go-lucky, oblivious, slapdash)
2
offhand(inattention, happy-go-lucky, slapdash)
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APASmart Define. (2015). unobservant thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/unobservant/thesaurus/synonyms
ChicagoSmart Define. 2015. "unobservant thesaurus" https://smartdefine.org/unobservant/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, unobservant thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/unobservant/thesaurus/synonyms>.
MLASmart Define. "unobservant thesaurus" 14 April 2015. Web. 1 October 2026. <https://smartdefine.org/unobservant/thesaurus/synonyms>