Can be confusedcredible creditable
Examples from the Web for creditably
The latter half of this task was, as we shall subsequently find, creditably performed by an important school of critical thinkers.Religion and Science|John Charlton Hardwick
In conclusion, he shall urge that Guido killed his wife in defence of the marriage vow, that he might creditably live.The Browning Cyclopdia|Edward Berdoe
I saw that it was no good—all I wanted now was to get out of it creditably and get rid of the Frenchman.The Black Poodle|F. Anstey
It was one that could only be creditably filled by one highly and exceptionally gifted, both in intellect and spirit.
Yes, and loafed through, creditably, too; even if Oom Peter did bully me into making a specialty of botany.The Return of Peter Grimm|David Belasco