elision vs exception

elision and exception both are nouns.

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

As nouns, elision and exception are synonyms defined as:

Other synonyms of elision include exclusion.

elision (noun)	exception (noun)
a deliberate act of omission	a deliberate act of omission
omission of a sound between two words (usually a vowel and the end of one word or the beginning of the next)	an instance that does not conform to a rule or generalization
	grounds for adverse criticism