Synonyms and related words :
adrift, afloat, alternating, amorphous, broken, capricious, careening, catchy, changeable, changeful, choppy, desultory, deviable, deviative, disconnected, discontinuous, dizzy, eccentric, erratic, fast and loose, fickle, fitful, flickering, flighty, flitting, fluctuant, fluctuational, freakish, giddy, guttering, halting, harmonic, herky-jerky, heteroclite, immethodical, impetuous, impulsive, inconsistent, inconstant, indecisive, infirm, intermittent, intermitting, irregular, irresolute, irresponsible, jerky, libratory, lurching, mazy, mercurial, moody, nonuniform, nutational, oscillating, oscillatory, patchy, pendular, pendulating, pendulous, periodic, rambling, resonant, restless, rough, roving, scatterbrained, scrappy, shapeless, shifting, shifty, shilly-shally, shilly-shallying, shuffling, snatchy, spasmatic, spasmic, spasmodic, spastic, spineless, sporadic, spotty, staggering, unaccountable, uncertain, uncontrolled, undependable, undisciplined, unequal, uneven, unfixed, unmethodical, unmetrical, unpredictable, unregular, unreliable, unrestrained, unrhythmical, unsettled, unstable, unstable as water, unstaid, unsteadfast, unsteady, unsystematic, vacillating, vacillatory, vagrant, variable, veering, vibratile, vibrating, vibratory, vicissitudinary, vicissitudinous, volatile, wandering, wanton, wavering, wavery, wavy, wayward, whimsical, wishy-washy, wobbling, wobbly