Main
Supplemental
Supplemental adjective - Available to supply something extra when needed.
Usage example: the new program will provide supplemental health insurance to thousands of workers
Main is an antonym for supplemental.
Both words in one sentence
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In Burton's translation, only "Sinbad" makes the main collection; "Aladdin" and "Ali Baba" are relegated to the supplemental volumes.
Source: Literature / Arabian Nights - Supplemental materials on the Metal Gear Solid 2 disc detail the past of the real Naomi and how the main Naomi was able to usurp her identity.
Source: Multiple-Choice Past -
The atmosphere near the atmospheric converter (and thus near the main colony site itself) is breathable, but further out supplemental oxygen masks are recommended.
Source: Terraform
Cite this Source
Supplemental and Main. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/main/supplemental
Main & Supplemental. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/main/supplemental>.
Supplemental or Main. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/main/supplemental.
Google Ngram Viewer shows how "main" and "supplemental" have occurred on timeline