The Collaborative International Dictionary of English v.0.48:
Disharmony \Dis*har"mo*ny\, n. Want of harmony; discord; incongruity. [R.] [1913 Webster] A disharmony in the different impulses that constitute it [our nature]. --Coleridge. [1913 Webster]WordNet (r) 3.0 (2006):
disharmony n 1: a lack of harmony [syn: disharmony, inharmoniousness]