The Collaborative International Dictionary
Unexceptionableness
Unexceptionable \Un`ex*cep"tion*a*ble\, a. Not liable to any exception or objection; unobjectionable; faultless; good; excellent; as, a man of most unexceptionable character. -- Un`ex*cep"tion*a*ble*ness, n. -- Un`ex*cep"tion*a*bly, adv.
Chesterfield is an unexceptionable witness.
--Macaulay.
Wiktionary
unexceptionableness
n. The state or condition of being unexceptionable.