The Collaborative International Dictionary of English v.0.48:
Overmuchness \O`ver*much"ness\, n. The quality or state of being in excess; superabundance. [R.] --B. Jonson. [1913 Webster]WordNet (r) 3.0 (2006):
overmuchness n 1: a quantity that is more than what is appropriate; "four- year-olds have an overabundance of energy"; "we received an inundation of email" [syn: overabundance, overmuch, overmuchness, superabundance]