Synonyms of unrestrained

1 Syllable
free
2 Syllables
nighthawk, heartiest, fiery, exempt, hearty, lavish, lawless, deep-felt, outgoing, looser, violent, rampant, full-out, loosest, heartier, firstclass
3 Syllables
recusant, tumultuous, exempting, unlatched, informal, impetuous, unfussy, unbolted, tempestuous, out-of-step, out-of-whack, unshackled, unhooked, unpinned, uncaged, exempted, uncurbed, boisterous, ferocious, hang-loose, outgiving, relaxed, tigerish, savage, rumbustious, throwaway
4 Syllables
unlimited, dissolute, extravagant, low-pressure, free-and-easy, anarchistic, disorderly, profusive, unselfconscious, unpeaceful, hysterical, unstoppable, effusive, out-of-control, unsecured, unself-conscious, ungoverned, unhampered, unrepressed, piratical, unconfined, unconstrained, untempered
5 Syllables
unmeasurable, inordinate, insuppressible, absolutistic, demonstrative, unsystematic, overindulgent, immoderate, uncontainable, unrestrainable, irrepressible, uncontrollable, unmanageable, uninhibited, undisciplined