Extension
Extension noun - The act of making longer.
Extra part and extension are semantically related. In some cases you can use "Extra part" instead a noun "Extension".
Extra part
Extension and extra part are semantically related. You can use "Extension" instead a noun phrase "Extra part".
Cite this Source
Extra part and Extension. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/extension/extra_part
Extension & Extra part. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/extension/extra_part>.
Extra part or Extension. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/extension/extra_part.
Google Ngram Viewer shows how "extension" and "extra part" have occurred on timeline