Complementary and Supplemental

Complementary

Complementary adjective - Related to each other in such a way that one completes the other.
Usage example: the complementary contributions of the cooking and cleanup committees were essential to the success of the church barbecue

Supplemental is a synonym for complementary in special topic. In some cases you can use "Supplemental" instead the word "Complementary" as an adjective or a noun, when it comes to topics like agree. popular alternative

Supplemental

Supplemental adjective - Available to supply something extra when needed.
Usage example: the new program will provide supplemental health insurance to thousands of workers

Complementary is a synonym for supplemental in special topic. You can use "Complementary" instead the word "Supplemental" as an adjective or a noun, if it concerns topics such as agree. popular alternative

Cite this Source
Supplemental and Complementary. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/complementary/supplemental
Complementary & Supplemental. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/complementary/supplemental>.
Supplemental or Complementary. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/complementary/supplemental.
Google Ngram Viewer shows how "complementary" and "supplemental" have occurred on timeline