Extension
Extension noun - The act of making longer.
Supplement is a synonym for extension in addition topic. In some cases you can use "Supplement" instead a noun "Extension", when it comes to topics like addendum, enlargement, annexe. popular alternative
Supplement
Supplement noun - Something added (as by growth).
Usage example: this new rule restricting e-mail to job-related activity is only a supplement to the preexisting policy regarding personal use of company resources
Extension is a synonym for supplement in addendum topic. You can use "Extension" instead a noun "Supplement", if it concerns topics such as appendix. popular alternative
Mutual synonyms
Related pairs
- attachment and extension
- attachment and supplement
- annex and extension
- annex and supplement
- addition and extension
- addition and supplement
- adjunct and extension
- adjunct and supplement
- addendum and extension
- addendum and supplement
- accessory and extension
- accessory and supplement
- appendage and extension
- appendage and supplement
How words are described
Cite this Source
Supplement and Extension. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/extension/supplement
Extension & Supplement. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/extension/supplement>.
Supplement or Extension. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/extension/supplement.
Google Ngram Viewer shows how "extension" and "supplement" have occurred on timeline