The Collaborative International Dictionary of English v.0.48:

Shapable \Shap"a*ble\, a.
   1. That may be shaped.
      [1913 Webster]

   2. Shapely. [R.] "Round and shapable." --De Foe.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "shapable":
   adaptable, bendable, bending, compliant, ductile, elastic,
   extensible, extensile, fabricable, facile, fictile, flexible,
   flexile, flexuous, formable, formative, giving, impressible,
   impressionable, like putty, limber, lissome, lithe, lithesome,
   malleable, moldable, plastic, pliable, pliant, receptive,
   responsive, sensitive, sequacious, springy, submissive, supple,
   susceptible, tractable, tractile, whippy, willowy, yielding