6
voluntarily(adverb, happily, willingly)
5
freely(adverb, happily, willingly, deliberately, voluntarily)
4
alternatively
4
electively
3
unnecessarily(adverb, pointlessly, needlessly)
2
arbitrarily
2
by choice(expression, happily, freely, willingly, deliberately)
2
discretionarily
2
facultatively
1
discretionally
1
extramurally
1
independently
1
optional
1
permissively
1
selectively
1
spontaneously(adverb, happily, freely, willingly, deliberately)
1
unrestrictedly
1
volitionally
1
without being asked(expression, idiom, happily, freely, willingly)
0
at pleasure(expression, idiom, choice)
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APASmart Define. (2016). optionally thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/optionally/thesaurus/synonyms
ChicagoSmart Define. 2016. "optionally thesaurus" https://smartdefine.org/optionally/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, optionally thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/optionally/thesaurus/synonyms>.
MLASmart Define. "optionally thesaurus" 30 March 2016. Web. 20 September 2026. <https://smartdefine.org/optionally/thesaurus/synonyms>