The Collaborative International Dictionary of English v.0.48:

Ungraceful \Un*grace"ful\, a.
   Not graceful; not marked with ease and dignity; deficient in
   beauty and elegance; inelegant; awkward; as, ungraceful
   manners; ungraceful speech.
   [1913 Webster]

         The other oak remaining a blackened and ungraceful
         trunk.                                   --Sir W.
                                                  Scott.
   [1913 Webster] -- Un*grace"ful*ly, adv. --
   Un*grace"ful*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ungraceful
    adj 1: lacking grace; clumsy; "a graceless production of the
           play"; "his stature low...his bearing ungraceful"- Sir
           Walter Scott [syn: graceless, ungraceful]

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "ungraceful":
   Doric, all thumbs, asymmetrical, awkward, barbaric, barbarous,
   blunderheaded, blundering, boorish, bumbling, bungling,
   butterfingered, cacophonous, careless, clownish, clumsy,
   clumsy-fisted, coarse, crude, cumbersome, doggerel, dysphemistic,
   fingers all thumbs, fumbling, gauche, gawkish, gawky, graceless,
   gross, ham-fisted, ham-handed, harsh, heavy-handed, hulking, hulky,
   ill-proportioned, improper, impure, in bad taste, inartistic,
   inconcinnate, inconcinnous, incorrect, indecorous, inelegant,
   infelicitous, klutzy, left-hand, left-handed, loutish, low,
   lubberly, lumbering, lumpish, maladroit, oafish, outlandish,
   ponderous, rude, sloppy, stiff, tasteless, ugly, unaesthetic,
   unattractive, uncourtly, uncouth, undignified, uneuphonious,
   unfelicitous, ungainly, ungraced, unhandy, unharmonious, unlovely,
   unpolished, unrefined, unseemly, unsymmetrical, unwieldy, vulgar