The Oxford Thesaurus An A-Z Dictionary of Synonyms - shapeless adj.

1) amorphous, formless, nebulous, unformed, indefinite, unstructured, vague: Sculptors start with a shapeless mass of clay. 2) unshapely, deformed, misshapen, distorted, twisted, bent, battered: The wreckage was a shapeless tangle of steel and mortar.