exception vs illustration

exception and illustration both are nouns.

Word	Noun	Adjective	Verb	Adverb
exception	Yes	No	No	No
illustration	Yes	No	No	No

As nouns, illustration is a hypernym of exception; that is, illustration is a word with a broader meaning than exception:

Other hypernyms of exception include example, instance, representative.

exception (noun)	illustration (noun)
a deliberate act of omission	a visual representation (a picture or diagram) that is used to make some subject more pleasing or easier to understand
an instance that does not conform to a rule or generalization	an item of information that is typical of a class or group
grounds for adverse criticism	artwork that helps make something clear or attractive
	showing by example