voluntary Synonyms

optional unpaid spontaneous honorary unprompted unforced intentional elective unsalaried discretionary free chosen willful willing volitional uncoerced for nothing willed facultative nonobligatory wilful nonmandatory uncompelled military volunteer willingly avocational self-directed spontaneously off-the-cuff unconstrained by choice non-compulsory unwaged witting volunteers not required not compulsory freewilled freely given unrewarded unrequired noncompulsory of one's own accord pro bono unasked uncompensated unrecompensed unremunerated unrequested unsolicited