- Definitions|2
- Thesaurus|1.6k
- Abbreviations|0
| frugal | |
| cheap(adjective, poor, unreasonable, noble, inexpensive) | |
| cost effective | |
| affordable(adjective, expensive, high-priced, pricey, pricely) | |
| inexpensive(adjective, unreasonable) | |
| prudent | |
| free(adjective, charge, vague, restricted, ambiguous) | |
| low class | |
| minor | |
| complimentary | |
| discounted | |
| gratuitous(adjective, free, reasonable) | |
| costless(mean, restrained) | |
| reasonable(adjective, poor) | |
| aiding(verb, adjective, poor, hurtful, unpromising) | |
| cut-price(unreasonable, expensive) | |
| gratis(adjective, free) | |
| helpful(adjective, poor) | |
| low | |
| not valuable(expression, adjective, idiom, poor, loss-making) |
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| APA | Smart Define. (2015). costly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/costly/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "costly thesaurus" https://smartdefine.org/costly/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, costly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/costly/thesaurus/antonyms>. |
| MLA | Smart Define. "costly thesaurus" 24 December 2015. Web. 22 September 2026. <https://smartdefine.org/costly/thesaurus/antonyms> |