The Collaborative International Dictionary of English v.0.48:

Wayward \Way"ward\, a. [OE. weiward, for aweiward, i. e., turned
   away. See Away, and -ward.]
   Taking one's own way; disobedient; froward; perverse;
   willful.
   [1913 Webster]

         My wife is in a wayward mood.            --Shak.
   [1913 Webster]

         Wayward beauty doth not fancy move.      --Fairfax.
   [1913 Webster]

         Wilt thou forgive the wayward thought?   --Keble.
   [1913 Webster] -- Way"ward*ly, adv. -- Way"ward*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

wayward
    adj 1: resistant to guidance or discipline; "Mary Mary quite
           contrary"; "an obstinate child with a violent temper"; "a
           perverse mood"; "wayward behavior" [syn: contrary,
           obstinate, perverse, wayward]

Moby Thesaurus II by Grady Ward, 1.0:

153 Moby Thesaurus words for "wayward":
   Adamic, Paphian, adrift, afloat, alternating, amorphous, arbitrary,
   backsliding, balky, cantankerous, capricious, carnal, chambering,
   changeable, changeful, contrary, cranky, cross-grained, crotchety,
   desultory, deviable, difficult, disobedient, dizzy, easy,
   eccentric, erratic, erring, fallen, fanciful, fantasied, fantastic,
   fast and loose, fickle, fitful, flaky, fleshly, flickering,
   flighty, flitting, fluctuating, frail, freakish, froward, giddy,
   harebrained, humorsome, impetuous, impulsive, impure, inconsistent,
   inconstant, indecisive, indisciplined, infirm, irascible,
   irregular, irresolute, irresponsible, kinky, lapsed, lawless, lax,
   light, loose, loose-moraled, maggoty, mazy, mercurial, moody,
   motiveless, naughty, nonconforming, notional, obstinate,
   of easy virtue, of loose morals, ornery, peccable, perverse,
   petulant, postlapsarian, prodigal, promiscuous, quirky, rambling,
   recidivist, recidivistic, recusant, restive, restless, roving,
   scatterbrained, self-willed, shapeless, shifting, shifty,
   shuffling, slack, spasmodic, spineless, stuffy, sulky, sullen,
   temperamental, transgressive, unaccountable, unangelic, uncertain,
   unchaste, unclean, uncomplying, uncontrolled, undependable,
   undisciplined, unduteous, undutiful, unfixed, ungodly, ungood,
   unpredictable, unreasonable, unreliable, unrestrained, unrighteous,
   unsaintly, unsettled, unstable, unstable as water, unstaid,
   unsteadfast, unsteady, unvirtuous, vacillating, vagarious, vagrant,
   variable, vicissitudinary, vicissitudinous, violative, virtueless,
   volatile, wandering, wanton, wavering, wavery, wavy, weak,
   whimsical, whorish, willful, wishy-washy, wrongheaded