WordNet (r) 3.0 (2006):

wobbly
    adj 1: inclined to shake as from weakness or defect; "a rickety
           table"; "a wobbly chair with shaky legs"; "the ladder
           felt a little wobbly"; "the bridge still stands though
           one of the arches is wonky" [syn: rickety, shaky,
           wobbly, wonky]
    n 1: a member of the Industrial Workers of the World

Moby Thesaurus II by Grady Ward, 1.0:

107 Moby Thesaurus words for "wobbly":
   aspen, broken, capricious, careening, catchy, chattering, choppy,
   desultory, deviative, dickey, dilapidated, disconnected,
   discontinuous, doddering, eccentric, erratic, faltering, fitful,
   flickering, fluctuant, fluctuating, groggy, guttering, halting,
   herky-jerky, hesitant, heteroclite, immethodical, inconstant,
   insecure, intermittent, intermitting, irregular, irresolute, jerky,
   lurching, nonuniform, oscillating, oscillatory, palsied, patchy,
   pendulating, quaking, quavering, quavery, quivering, quivery,
   rachitic, rackety, rambling, ramshackle, rattletrap, ricketish,
   rickety, rocky, rootless, rough, scrappy, shaking, shaky,
   shilly-shally, shilly-shallying, shivering, shivery, shuddering,
   snatchy, spasmatic, spasmic, spasmodic, spastic, spidery, spindly,
   sporadic, spotty, staggering, succussatory, succussive, teetering,
   teetery, tentative, tottering, tottery, trembling, trembly,
   tremulous, tumbledown, uncertain, unequal, uneven, unmethodical,
   unmetrical, unregular, unrhythmical, unsettled, unstable, unsteady,
   unsure, unsystematic, vacillating, vacillatory, variable, veering,
   vibrating, wandering, wavering, weak, wobbling