[syn: tortuosity, tortuousness, torsion, contortion, crookedness]
The Collaborative International Dictionary of English v.0.48:
Contortion \Con*tor"tion\ (k[o^]n*t[^o]"sh[u^]n), n. [L.
   contortio: cf. F. contorsion. See Contort, and cf.
   Torsion.]
   A twisting; a writhing; wry motion; a twist; as, the
   contortion of the muscles of the face. --Swift.
   [1913 Webster]
         All the contortions of the sibyl, without the
         inspiration.                             --Burke.
   [1913 Webster]
WordNet (r) 3.0 (2006):
contortion
    n 1: the act of twisting or deforming the shape of something
         (e.g., yourself) [syn: contortion, deformation]
    2: a tortuous and twisted shape or position; "they built a tree
       house in the tortuosities of its boughs"; "the acrobat
       performed incredible contortions" [syn: tortuosity,
       tortuousness, torsion, contortion, crookedness]
Moby Thesaurus II by Grady Ward, 1.0:
25 Moby Thesaurus words for "contortion":
   anamorphism, anamorphosis, asymmetry, buckle, crookedness,
   detorsion, deviation, disproportion, distortion, gnarl, imbalance,
   irregularity, knot, lopsidedness, quirk, screw, torsion,
   tortuosity, turn, twist, unsymmetry, warp, wrench, wrest, wring