42 entries under slapdash 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, casual)
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, casual)
6
remiss(noun, adjective, careless, cold, foolish)
5
inconsiderate(adjective, cold, indifferent, casual, forget)
5
indifferent(noun, adjective, careless, casual, apathetic)
5
unthinking(adjective, careless, indifferent, foolish, stupid)
3
unconcerned(noun, adjective, careful, casual, happy-go-lucky)
2
abstracted(noun, adjective, careless, casual, thoughtless)
2
cursory(casual, inattention, happy-go-lucky)
2
disregardful(casual, rash, happy-go-lucky, oblivious)
2
offhand(casual, inattention, happy-go-lucky)
2
reckless(adjective, casual, rash, obtuse, happy-go-lucky)
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APASmart Define. (2015). unobservant thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unobservant/thesaurus/synonyms
ChicagoSmart Define. 2015. "unobservant thesaurus" https://smartdefine.org/unobservant/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unobservant thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unobservant/thesaurus/synonyms>.
MLASmart Define. "unobservant thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/unobservant/thesaurus/synonyms>