Auxiliary
Auxiliary adjective - Available to supply something extra when needed.
Mutual synonyms
Both words in one sentence
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The auxiliary warp drive controls are activated with a red button.
Cite this Source
Button and Auxiliary. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/auxiliary/button
Auxiliary & Button. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/auxiliary/button>.
Button or Auxiliary. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/auxiliary/button.
Google Ngram Viewer shows how "auxiliary" and "button" have occurred on timeline