Costless and Costly

Costless

Costless adjective - Not costing or charging anything.
Usage example: maintaining a checking account with the bank is not the costless service that its advertising would have you believe

Costly is an antonym for costless in topics: free, without charge.

Nearby Words: cost, costly

Costly

Costly adjective - Commanding a large price.

Costless is an antonym for costly.

Nearby Words: cost, costless, costliness
Cite this Source
Costly and Costless. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/costless/costly
Costless & Costly. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/costless/costly>.
Costly or Costless. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/costless/costly.
Google Ngram Viewer shows how "costless" and "costly" have occurred on timeline