The Collaborative International Dictionary of English v.0.48:

Crudity \Cru"di*ty\ (kr[udd]"d[i^]*t[y^]), n.; pl. Crudities
   (-t[i^]z). [L. cruditas, fr. crudus: cf. F. crudit['e]. See
   Crude.]
   1. The condition of being crude; rawness.
      [1913 Webster]

   2. That which is in a crude or undigested state; hence,
      superficial, undigested views, not reduced to order or
      form. "Crudities in the stomach." --Arbuthnot.
      [1913 Webster]

WordNet (r) 3.0 (2006):

crudity
    n 1: a wild or unrefined state [syn: crudeness, crudity,
         primitiveness, primitivism, rudeness]
    2: an impolite manner that is vulgar and lacking tact or
       refinement; "the whole town was famous for its crudeness"
       [syn: crudeness, crudity, gaucheness]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "crudity":
   callowness, coarseness, crassness, crudeness, earthiness,
   gaudiness, greenness, grossness, immatureness, immaturity,
   loudness, meretriciousness, nondevelopment, obscenity,
   oversimplicity, oversimplification, rawness, reductionism,
   ribaldry, roughness, rudeness, simplism, the rough, uncultivation,
   undevelopment, unfinish, unfinishedness, unfledgedness,
   unrefinement, unripeness