The Collaborative International Dictionary of English v.0.48:
Grotesqueness \Gro*tesque"ness\, n. Quality of being grotesque. [1913 Webster]WordNet (r) 3.0 (2006):
grotesqueness n 1: ludicrous or incongruous unnaturalness or distortion [syn: grotesqueness, grotesquery, grotesquerie]