Synonyms and related words :
Olympian, arbitrary, autonomous, candid, detached, discretional, discretionary, disinterested, dispassionate, elective, equitable, evenhanded, fair, free, free will, gratuitous, impartial, impersonal, independent, indifferent, just, lofty, neutral, nonmandatory, objective, offered, optional, proffered, self-acting, self-active, self-determined, self-determining, selfless, spontaneous, unaffected, unasked, unbesought, unbiased, unbidden, uncalled-for, uncoerced, uncompelled, undazzled, unforced, uninvited, unjaundiced, unmoved, unprejudiced, unprepossessed, unpressured, unprompted, unrequested, unrequired, unselfish, unsolicited, unsought, unswayed, voluntary, volunteer, willful