Optional
Optional adjective - Subject to one's freedom of choice.
Reserve and optional are semantically related. In some cases you can use "Reserve" instead an adjective "Optional".
Nearby Words: option, optionally
Both words in one sentence
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In some countries, schools which are not generally military in approach may have optional military training organisations as official extra-curricular activities, such as the Junior Reserve Officers' Training Corps (JROTC) in the USA or the Officer Training Corps (OTC) in British private schools.
Source: Military School
Cite this Source
Reserve and Optional. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/optional/reserve
Optional & Reserve. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/optional/reserve>.
Reserve or Optional. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/optional/reserve.
Google Ngram Viewer shows how "optional" and "reserve" have occurred on timeline