The Collaborative International Dictionary of English v.0.48:
Undisputable \Un*dis"pu*ta*ble\, a. Indisputable. --Addison. -- Un*dis"pu*ta*ble*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
undisputable adj 1: not open to question; obviously true; "undeniable guilt"; "indisputable evidence of a witness" [syn: incontestable, indisputable, undisputable]