5
inconsiderate(adjective, cold, indifferent, casual, forget)
5
indifferent(noun, adjective, careless, casual, apathetic)
5
uncaring(noun, adjective, cold, forget, inattentive)
5
unheedful(adjective, cold, forget, uncaring, inattentive)
5
unthinking(adjective, careless, indifferent, foolish, stupid)
5
unwary(adjective, cold, forget, uncaring, inattentive)
4
distracted(noun, adjective, careless, indifferent, apathetic)
4
mindless(adjective, careless, stupid, careful, casual)
4
oscitant(noun, adjective, cold, forget, uncaring)
4
perfunctory(adjective, cold, forget, uncaring, inattentive)
4
preoccupied(adjective, careless, indifferent, apathetic, unconcerned)
4
unconscious(adjective, careless, indifferent, apathetic, remote)
4
undiscerning(adjective, careless, indifferent, foolish, stupid)
4
unperceiving(adjective, careless, indifferent, apathetic, insensitive)
3
incogitant(adjective, cold, forget, uncaring, inattentive)
3
inexact(adjective, cold, forget, uncaring, inattentive)
3
unattending(adjective, cold, forget, uncaring, inattentive)
3
unconcerned(noun, adjective, careful, casual, happy-go-lucky)
3
unlistening(adjective, cold, forget, uncaring, inattentive)
3
unobliging(adjective, cold, forget, uncaring, inattentive)
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APASmart Define. (2015). unobservant thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unobservant/thesaurus/synonyms
ChicagoSmart Define. 2015. "unobservant thesaurus" https://smartdefine.org/unobservant/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, unobservant thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unobservant/thesaurus/synonyms>.
MLASmart Define. "unobservant thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/unobservant/thesaurus/synonyms>