13
frugal
11
cheap(adjective, poor, unreasonable, noble, inexpensive)
8
cost effective
6
affordable(adjective, expensive, high-priced, pricey, pricely)
4
inexpensive(adjective, unreasonable)
3
prudent
2
free(adjective, charge, vague, restricted, ambiguous)
2
low class
2
minor
1
complimentary
1
discounted
1
gratuitous(adjective, free, reasonable)
1
costless(mean, restrained)
0
reasonable(adjective, poor)
0
aiding(verb, adjective, poor, hurtful, unpromising)
0
cut-price(unreasonable, expensive)
0
gratis(adjective, free)
0
helpful(adjective, poor)
0
low
0
not valuable(expression, adjective, idiom, poor, loss-making)
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APASmart Define. (2015). costly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/costly/thesaurus/antonyms
ChicagoSmart Define. 2015. "costly thesaurus" https://smartdefine.org/costly/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, costly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/costly/thesaurus/antonyms>.
MLASmart Define. "costly thesaurus" 24 December 2015. Web. 22 September 2026. <https://smartdefine.org/costly/thesaurus/antonyms>