22 entries under open topic. ×

19
optional(adjective, chance, choice, freedom)
12
discretional(adjective, free, will, voluntary)
11
elective(adjective, free, fit, choice)
8
arbitrary(adjective, free, chance, opinion)
8
facultative(adjective, free, choice, voluntary)
8
voluntary(adjective, free, will, elective)
6
nonmandatory
6
unrestricted(adjective, free, freedom, voluntary)
5
open(adjective, free, extra, responsive)
4
free(adjective, will, voluntary, elective)
4
nonobligatory(adjective, free, voluntary, elective)
4
unforced(adjective, free, voluntary, elective)
3
volitional(free, will, voluntary, elective)
2
alternative(adjective, free, voluntary, elective)
2
leftover
1
at the call
1
judge and jury
0
extra(free, voluntary, elective)
0
no strings attached(expression, idiom, free, voluntary)
0
noncompulsory(free, voluntary, elective)
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APASmart Define. (2015). discretionary thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/discretionary/thesaurus/synonyms
ChicagoSmart Define. 2015. "discretionary thesaurus" https://smartdefine.org/discretionary/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, discretionary thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/discretionary/thesaurus/synonyms>.
MLASmart Define. "discretionary thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/discretionary/thesaurus/synonyms>