9
expensive(adjective, reasonable)
9
luxury
7
time-consuming
6
wasteful(adjective, careful, economical)
6
extravagant(adjective, calm, good, plain, indulgent)
6
lavish(adjective, mean, splendid, scanty, profuse)
5
uneconomical(adjective, reasonable, inefficient)
4
sumptuous(adjective, bad, plain)
3
inefficient
3
careless(adjective, inefficient)
3
excessive(adjective, moderate, low)
2
profligate
2
spendthrift
2
squandering
2
costly
2
generous
2
improvident
2
liberal(adjective, limited, generous, narrow, giving)
2
luxurious
2
opulence
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APASmart Define. (2016). economical thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/economical/thesaurus/antonyms
ChicagoSmart Define. 2016. "economical thesaurus" https://smartdefine.org/economical/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2016, economical thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/economical/thesaurus/antonyms>.
MLASmart Define. "economical thesaurus" 23 February 2016. Web. 28 September 2026. <https://smartdefine.org/economical/thesaurus/antonyms>