The Collaborative International Dictionary of English v.0.48:

Mazy \Ma"zy\, a. [From Maze.]
   Perplexed with turns and windings; winding; intricate;
   confusing; perplexing; embarrassing; as, mazy error.
   --Milton.
   [1913 Webster]

         To range amid the mazy thicket.          --Spenser.
   [1913 Webster]

         To run the ring, and trace the mazy round. --Dryden.
   [1913 Webster]

WordNet (r) 3.0 (2006):

mazy
    adj 1: resembling a labyrinth in form or complexity; "a
           labyrinthine network of tortuous footpaths" [syn:
           labyrinthine, labyrinthian, mazy]

Moby Thesaurus II by Grady Ward, 1.0:

201 Moby Thesaurus words for "mazy":
   Byzantine, aberrant, aberrative, adrift, affluent, afloat,
   alternating, ambagious, amorphous, anfractuous, balled up, bent,
   billowing, billowy, capricious, changeable, changeful, circuitous,
   circumlocutory, complex, complicated, confluent, confounded,
   confused, convoluted, convolutional, coursing, crabbed, curvaceous,
   curvate, curvated, curve, curved, curvesome, curviform,
   curvilineal, curvilinear, curving, curvy, daedal, decurrent,
   defluent, departing, desultory, deviable, deviant, deviating,
   deviative, deviatory, devious, diffluent, digressive, discursive,
   dizzy, eccentric, elaborate, embrangled, entangled, errant,
   erratic, excursive, fast and loose, fickle, fitful, flexuose,
   flexuous, flickering, flighty, flitting, flowing, fluctuating,
   fluent, fluxional, fluxive, fouled up, freakish, gulfy, gushing,
   impetuous, implicated, impulsive, inconsistent, inconstant,
   incurvate, incurvated, incurved, incurving, indecisive, indirect,
   infirm, intricate, involute, involuted, involutional, involved,
   irregular, irresolute, irresponsible, knotted, labyrinthian,
   labyrinthine, loused up, many-faceted, matted, meandering,
   meandrous, mercurial, messed up, mixed up, moody, mucked up,
   multifarious, out-of-the-way, perplexed, planetary, pouring,
   profluent, racing, rambling, ramified, recurvate, recurvated,
   recurved, recurving, restless, rivose, rivulose, roundabout,
   roving, ruffled, running, rushing, scatterbrained, screwed up,
   serpentine, shapeless, shifting, shifty, shuffling, sinuate,
   sinuose, sinuous, sluggish, snaky, snarled, spasmodic, spineless,
   stray, streaming, subtle, surging, surgy, swerving, tangled,
   tangly, tidal, torsional, tortile, tortuous, turning, twisted,
   twisting, twisty, unaccountable, uncertain, uncontrolled,
   undependable, undirected, undisciplined, undulant, unfixed,
   unpredictable, unreliable, unrestrained, unsettled, unstable,
   unstable as water, unstaid, unsteadfast, unsteady, vacillating,
   vagrant, variable, veering, vicissitudinary, vicissitudinous,
   volatile, vortical, wandering, wanton, wavering, wavery, wavy,
   wayward, whimsical, whorled, winding, wishy-washy, wreathlike,
   wreathy, zigzag