Extension
Extension noun - The act of making longer.
Optional extra and extension are semantically related. In some cases you can use "Optional extra" instead a noun "Extension".
Optional extra
Extension and optional extra are semantically related. Sometimes you can use "Extension" instead a noun phrase "Optional extra".
Mutual synonyms
Related pairs
- attachment and extension
- attachment and optional extra
- addition and extension
- addition and optional extra
- adjunct and extension
- adjunct and optional extra
- addendum and extension
- addendum and optional extra
- accessory and extension
- accessory and optional extra
- appendage and extension
- appendage and optional extra
- supplement and extension
- supplement and optional extra
Cite this Source
Optional extra and Extension. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/extension/optional_extra
Extension & Optional extra. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/extension/optional_extra>.
Optional extra or Extension. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/extension/optional_extra.
Google Ngram Viewer shows how "extension" and "optional extra" have occurred on timeline