Optional
Possible
Possible adjective - Capable of being done or carried out.
Optional and possible are semantically related. Sometimes you can replace term "Optional" with "Possible", this adjectives are similar.
Nearby Words: possibility, possibly
Mutual synonyms
Both words in one sentence
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Talking the Monster to Death: Instead of an optional requirement, it's the only possible way to win against the effectively-immortal Darth Sion.
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Just under half of your possible party members in Xenoblade Chronicles X are completely optional.
Source: Optional Party Member - A bunch of characters are only optional recruitments, and in several cases, it's possible to accidentally kill them instead of recruiting them.
Source: Lost Forever
Cite this Source
Possible and Optional. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/optional/possible
Optional & Possible. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/optional/possible>.
Possible or Optional. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/optional/possible.
Google Ngram Viewer shows how "optional" and "possible" have occurred on timeline