Accessory
Accessory adjective - Available to supply something extra when needed.
Usage example: most phone services offer accessory features such as call-waiting
Requisite
How words are described
Cite this Source
Requisite and Accessory. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/accessory/requisite
Accessory & Requisite. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/accessory/requisite>.
Requisite or Accessory. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/accessory/requisite.
Google Ngram Viewer shows how "accessory" and "requisite" have occurred on timeline