| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | possible; available as choice |
| Synonyms: | alternative, arbitrary, discretional, discretionary, elective, extra, facultative, free, no strings attached, noncompulsory, nonobligatory, not required, open, unforced, unrestricted, up to the individual, volitional, voluntary |
| Antonyms: | compulsory, forced, required |
| Main Entry: | facultative |
| Part of Speech: | adjective |
| Definition: | optional |
| Synonyms: | discretional, discretionary, elective, noncompulsory, nonobligatory, not required, volitional, voluntary |
| Main Entry: | uncompelled |
| Part of Speech: | adjective |
| Definition: | voluntary |
| Synonyms: | autonomous, chosen, deliberate, designful, discretional, elected, free, free-willed, freely, gratuitous, honorary, independent, intended, intentional, opted, optional, spontaneous, unasked, unbidden, unconstrained, unforced, unpaid, unprescribed, volitional, volunteer, willed, willful, wished, witting |
| Main Entry: | unforced |
| Part of Speech: | adjective |
| Definition: | voluntary |
| Synonyms: | autonomous, chosen, deliberate, designful, discretional, elected, free, free-willed, freely, gratuitous, honorary, independent, intended, intentional, opted, optional, spontaneous, unasked, unbidden, uncompelled, unconstrained, unpaid, unprescribed, volitional, volunteer, willed, willful, wished, witting |