The Collaborative International Dictionary of English v.0.48:

Misshapen \Mis*shap"en\, a.
   Having a bad or ugly form. "The mountains are misshapen."
   --Bentley.
   [1913 Webster] -- Mis*shap"en*ly, adv. --
   Mis*shap"en*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

misshapen
    adj 1: so badly formed or out of shape as to be ugly; "deformed
           thalidomide babies"; "his poor distorted limbs"; "an ill-
           shapen vase"; "a limp caused by a malformed foot";
           "misshapen old fingers" [syn: deformed, distorted,
           ill-shapen, malformed, misshapen]

Moby Thesaurus II by Grady Ward, 1.0:

105 Moby Thesaurus words for "misshapen":
   acromegalic, aimless, amorphous, awry, bandy, bandy-legged,
   baroque, bizarre, blemished, bloated, bowlegged, cacogenic,
   capricious, casual, club-footed, contorted, crippled, crooked,
   defaced, deformed, desultory, disarticulated, discontinuous,
   disfigured, disjunct, disordered, dispersed, disproportionate,
   distorted, dwarfed, erratic, fitful, flatfooted, formless, freak,
   freakish, frivolous, gargoylish, gnarled, gratuitous, grotesque,
   haphazard, hit-or-miss, ill-made, ill-proportioned, ill-shaped,
   immethodical, inchoate, incoherent, indiscriminate, irregular,
   knock-kneed, malformed, marred, meaningless, misbegotten,
   misproportioned, monstrous, mutilated, nonsymmetrical,
   nonsystematic, nonuniform, orderless, out of shape, pigeon-toed,
   planless, promiscuous, pug-nosed, rachitic, random, rickety,
   rococo, senseless, shapeless, simous, snub-nosed, spasmodic,
   sporadic, straggling, straggly, stumpy, swaybacked, systemless,
   talipedic, teratic, teratogenic, teratoid, truncated, twisted,
   unarranged, unclassified, undirected, ungraded, unjoined,
   unmethodical, unordered, unorganized, unshapely, unsorted,
   unsymmetrical, unsystematic, ununiform, vague, wandering, warped