Costless and Complimentary

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

Complimentary is a synonym for costless in free topic. In some cases you can use "Complimentary" instead an adjective "Costless", when it comes to topics like for free, without charge. popular alternative

Nearby Words: cost, costly

Complimentary

Complimentary adjective - Not costing or charging anything.
Usage example: the airline will continue to give out complimentary soft drinks on all domestic flights

Costless is a synonym for complimentary in free topic. You can use "Costless" instead an adjective "Complimentary". popular alternative

Nearby Words: compliment, complimented
Cite this Source
Complimentary and Costless. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/costless/complimentary
Costless & Complimentary. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/costless/complimentary>.
Complimentary or Costless. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/costless/complimentary.
Google Ngram Viewer shows how "costless" and "complimentary" have occurred on timeline