43 entries under happy-go-lucky topic. ×

13
negligent(adjective, soft, sharp, rude, careless)
11
careless(adjective, soft, casual, thoughtless, unconcerned)
8
inconsiderate(adjective, sharp, rude, careless, indifferent)
8
remiss(adjective, soft, careless, indifferent, casual)
8
thoughtless(adjective, sharp, slow, rude, careless)
8
unmindful(adjective, soft, sharp, rude, careless)
7
forgetful(adjective, soft, careless, indifferent, casual)
7
heedless(adjective, sharp, rude, careless, indifferent)
6
inadvertent(adjective, careless, indifferent, casual, thoughtless)
6
reckless(adjective, casual, rash, oblivious)
5
lax(adjective, soft, careless, indifferent, casual)
5
perfunctory(adjective, casual, slapdash, neglectful)
5
unconcerned(adjective, sharp, rude, careless, indifferent)
5
unthinking(adjective, sharp, rude, careless, indifferent)
4
indifferent(adjective, soft, sharp, slow, rude)
4
regardless(adjective, adverb, soft, slow, careless)
3
absent-minded(adjective, casual, inattentive, slapdash)
3
casual(adjective, soft, careless, common, tolerant)
3
cursory(adjective, careless, indifferent, casual, thoughtless)
3
slipshod(adjective, soft, slow, careless, indifferent)
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APASmart Define. (2015). disregardful thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/disregardful/thesaurus/synonyms
ChicagoSmart Define. 2015. "disregardful thesaurus" https://smartdefine.org/disregardful/thesaurus/synonyms (accessed October 2, 2026).
HarvardSmart Define 2015, disregardful thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/disregardful/thesaurus/synonyms>.
MLASmart Define. "disregardful thesaurus" 13 April 2015. Web. 2 October 2026. <https://smartdefine.org/disregardful/thesaurus/synonyms>