21
reckless(adjective, neglect, careless, foolish, cheerful)
20
prodigal(noun, adjective, careless, extravagant, generous)
20
wasteful(adjective, careless, casual, extravagant, thoughtless)
18
lavish(adjective, careless, extravagant, generous, splendid)
17
imprudent(noun, adjective, neglect, careless, foolish)
17
extravagant(adjective, weak, careless, generous, incompetent)
16
incautious(adjective, careless, foolish, careful, casual)
16
thoughtless(adjective, careless, foolish, casual, bold)
15
careless(adjective, foolish, casual, bold, extravagant)
15
heedless(adjective, careless, foolish, cheerful, casual)
15
profligate(noun, adjective, careless, extravagant, generous)
15
rash(adjective, careless, foolish, stupid, careful)
12
spendthrift(noun, adjective, money, careless, extravagant)
11
thriftless(adjective, careless, careful, extravagant, generous)
9
ill-considered(adjective, careless, foolish, stupid, careful)
9
impetuous(adjective, careless, careful, bold, thoughtless)
9
profuse(adjective, careless, spendthrift, prodigality)
9
unthrifty(adjective, careless, careful, reckless, spendthrift)
8
ill-judged(adjective, careless, foolish, bold, thoughtless)
8
impulsive(adjective, careless, foolish, careful, bold)
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APASmart Define. (2015). improvident thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/improvident/thesaurus/synonyms
ChicagoSmart Define. 2015. "improvident thesaurus" https://smartdefine.org/improvident/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, improvident thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/improvident/thesaurus/synonyms>.
MLASmart Define. "improvident thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/improvident/thesaurus/synonyms>