3
expensive(adjective, price, expenses, costliness)
3
ineffective(adjective, expenses, cheapness, costliness)
3
ineffectual(adjective, expenses, cheapness, costliness)
3
pricey(adjective, price, expenses, costliness)
3
uneconomical(adjective, price, expenses, costliness)
3
unproductive(adjective, expenses, cheapness, costliness)
3
worthless(adjective, price, expenses, costliness)
2
thriveless(adjective, cost, expenses, unprofitable, nonprofit)
2
unbeneficial(adjective, cost, expenses, unprofitable, nonprofit)
2
unfavorable(adjective, cost, expenses, unprofitable, nonprofit)
2
unfavourable(adjective, cost, expenses, unprofitable, nonprofit)
2
unremunerative(adjective, cost, expenses, unprofitable, nonprofit)
2
valueless(adjective, expenses, cheapness, costliness)
1
counterproductive(adjective, expenses, cheapness, costliness)
1
insignificant(adjective, expenses, cheapness, costliness)
1
thriftless(adjective, finance, expenses, costliness)
1
unavailing(adjective, expenses, cheapness, costliness)
1
unreasonable(adjective, finance, expenses, costliness)
1
unthrifty(adjective, finance, expenses, costliness)
1
waste(adjective, expenses, cheapness, costliness)
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APASmart Define. (2011). cost effective thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/cost_effective/thesaurus/antonyms
ChicagoSmart Define. 2011. "cost effective thesaurus" https://smartdefine.org/cost_effective/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2011, cost effective thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/cost_effective/thesaurus/antonyms>.
MLASmart Define. "cost effective thesaurus" 23 May 2011. Web. 26 September 2026. <https://smartdefine.org/cost_effective/thesaurus/antonyms>