optional Synonyms

not necessarily nonmandatory marvell extracurricular uncompelled unrestricted uncoerced unnecessary willful willed volunteer voluntary volitive nonobligatory unforced electoral up to the individual not compulsory not required not obligatory at one's discretion unrequired unasked sunnah noncompulsory non-compulsory unneeded facultative volitional volitient extra escapable elective elected disposable dispensable discretionary discretional deliberate chosen choice arbitrary extraneous free gratuitous undistinctive uncalled-for unbidden spontaneous selective