The Collaborative International Dictionary of English v.0.48:
Creditably \Cred"it*a*bly\ (-?-bl?), adv. In a creditable manner; reputably; with credit. [1913 Webster]WordNet (r) 3.0 (2006):
creditably adv 1: to a tolerably worthy extent; "he did respectably well for his age" [syn: respectably, creditably]