Extra
Extra noun - An interchangeable part or piece of equipment that is kept on hand for replacement of an original.
Supplementary part and extra are semantically related. In some cases you can use "Supplementary part" instead a noun "Extra".
Supplementary part
Extra and supplementary part are semantically related. You can use "Extra" instead a noun phrase "Supplementary part".
Mutual synonyms
Cite this Source
Supplementary part and Extra. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/extra/supplementary_part
Extra & Supplementary part. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/extra/supplementary_part>.
Supplementary part or Extra. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/extra/supplementary_part.
Google Ngram Viewer shows how "extra" and "supplementary part" have occurred on timeline