Synonyms and related words :
adrift, afloat, alternating, amorphous, capricious, carefree, careless, changeable, changeful, chartered, desultory, deviable, devil-may-care, disobedient, dizzy, eccentric, erratic, excepted, excused, exempt, exempted, fast and loose, favored, feckless, fickle, fitful, flickering, flighty, flitting, fluctuating, fly-by-night, freakish, giddy, headstrong, heady, immune, impetuous, impulsive, incautious, inconsistent, inconstant, indecisive, ineffectual, infirm, insubordinate, irregular, irresolute, lawless, let off, licensed, licentious, mazy, mercurial, moody, mutinous, permitted, privileged, rambling, rampant, rash, reckless, reinless, released, restless, roving, scatterbrained, self-willed, shapeless, shifting, shifty, shuffling, spared, spasmodic, spineless, trustless, unaccountable, unanswerable, unbridled, uncertain, unchecked, uncontrolled, uncurbed, undependable, undisciplined, unfaithworthy, unfixed, ungoverned, unliable, unpredictable, unreined, unreliable, unrestrained, unruly, unsettled, unstable, unstable as water, unstaid, unsteadfast, unsteady, unsubject, unsure, untrustworthy, untrusty, vacillating, vagrant, variable, vicissitudinary, vicissitudinous, volatile, wandering, wanton, wavering, wavery, wavy, wayward, weak, whimsical, wild, wildcat, willful, wishy-washy