Synonyms and related words :
arbitrary, autarchic, autarkic, autonomous, discretional, discretionary, elective, free, free will, free-spirited, freewheeling, gratuitous, independent, individualistic, inner-directed, neutral, nonaligned, nonmandatory, nonpartisan, offered, optional, proffered, self-acting, self-active, self-contained, self-dependent, self-determining, self-directing, self-governed, self-governing, self-reliant, self-subsistent, self-sufficient, self-supporting, sovereign, spontaneous, third-force, third-world, unasked, unbesought, unbidden, uncalled-for, uncoerced, uncompelled, unforced, uninfluenced, uninvited, unpressured, unprompted, unrequested, unrequired, unsolicited, unsought, voluntary, volunteer, willful