Functional
Functional adjective - Being in effective operation.
Unused and functional are semantically related. In some cases you can use "Unused" instead an adjective "Functional".
Unused
Unused adjective - Not having acquired a habit or tolerance.
Functional and unused are semantically related. Sometimes you can use "Functional" instead an adjective "Unused".
Both words in one sentence
-
The interstellar Ring network left behind by the protomolecule masters is mostly functional despite going unused for at least a few hundred million years.
Source: Ragnarok-Proofing
Cite this Source
Unused and Functional. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/functional/unused
Functional & Unused. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/functional/unused>.
Unused or Functional. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/functional/unused.
Google Ngram Viewer shows how "functional" and "unused" have occurred on timeline