acceptable vs unexceptionable

acceptable and unexceptionable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
acceptable	No	Yes	No	No
unexceptionable	No	Yes	No	No

acceptable (adjective)	unexceptionable (adjective)
worthy of acceptance or satisfactory	completely acceptable; not open to exception or reproach
adequate for the purpose
meeting requirements
judged to be in conformity with approved usage