elected vs elective

elected is not a noun while elective is a noun.

Word	Noun	Adjective	Verb	Adverb
elected	No	Yes	No	No
elective	Yes	Yes	No	No

As adjectives, elected and elective are synonyms defined as:

elected (noun)	elective (noun)
	a course that the student can select from among alternatives

elected (adjective)	elective (adjective)
subject to popular election	subject to popular election
	optional