The Collaborative International Dictionary of English v.0.48:

Tangibility \Tan`gi*bil"i*ty\, n. [Cf. F. tanggibilit['e].]
   The quality or state of being tangible.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tangibility
    n 1: the quality of being perceivable by touch [syn:
         tangibility, tangibleness, palpability] [ant:
         impalpability, intangibility, intangibleness]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "tangibility":
   apparentness, body, clearness, concreteness, crystal-clearness,
   density, distinctness, durability, evidence, evidentness, firmness,
   manifestness, mass, materiality, obviousness, openness,
   openness to sight, overtness, palpability, patentness, perspicuity,
   plainness, ponderability, solidity, soundness, stability,
   steadiness, stoutness, strength, sturdiness, substance,
   substantiality, substantialness, tactility, touchableness,
   toughness, unmistakableness, unquestionability, visibility