electric automobile vs electric

electric automobile and electric both are nouns.

Word	Noun	Adjective	Verb	Adverb
electric automobile	Yes	No	No	No
electric	Yes	Yes	No	No

As nouns, electric automobile and electric are synonyms defined as:

Other synonyms of electric automobile include electric car.

electric automobile (noun)	electric (noun)
a car that is powered by electricity	a car that is powered by electricity

electric automobile (adjective)	electric (adjective)
	using or providing or producing or transmitting or operated by electricity
	affected by emotion as if by electricity; thrilling
	(of a situation) exceptionally tense