3
counterproductive(weak, stupid, idle, useless, incompetent)
3
easy(adjective, feature, state, indifferent, trait)
3
easygoing(adjective, feature, state, trait)
3
effete
3
hopeless(adjective, weak, stupid, idle, useless)
3
inadvertent(adjective, careless, thoughtless, rash, unwise)
3
inefficient(adjective, inferior, inadequate, limited, feeble)
3
insignificant(adjective, dull, weak, value, unimportant)
3
insouciant(adjective, feature, state, indifferent, trait)
3
languid(adjective, feature, state, trait)
3
lax(adjective, feature, state, careless, trait)
3
unavailing(adjective, weak, stupid, inferior, idle)
3
unpurposed(adjective, value, stupid, insignificant, idle)
3
untroubled(adjective, feature, state, indifferent, trait)
2
barren(inadequate, limited, feeble, useless, vain)
2
cumbersome
2
empty(adjective, value, insignificant, unimportant, irregular)
2
fly-by-night(adjective, madcap, unaccountable, irresponsive)
2
fruitless(weak, stupid, inferior, idle, inadequate)
2
helpless
11 years ago|5.8k views|share |citing 
APASmart Define. (2015). feckless thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/feckless/thesaurus/synonyms
ChicagoSmart Define. 2015. "feckless thesaurus" https://smartdefine.org/feckless/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, feckless thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/feckless/thesaurus/synonyms>.
MLASmart Define. "feckless thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/feckless/thesaurus/synonyms>