The Collaborative International Dictionary of English v.0.48:
Ungainliness \Un*gain"li*ness\, n. The state or quality of being ungainly; awkwardness. [1913 Webster]WordNet (r) 3.0 (2006):
ungainliness n 1: the carriage of someone whose movements and posture are extremely ungainly and inelegant [syn: gawkiness, ungainliness]