crossover voter vs elector

crossover voter and elector both are nouns.

Word	Noun	Adjective	Verb	Adverb
crossover voter	Yes	No	No	No
elector	Yes	No	No	No

As nouns, elector is a hypernym of crossover voter; that is, elector is a word with a broader meaning than crossover voter:

crossover voter: a voter who is registered as a member of one political party but who votes in the primary of another party
elector: a citizen who has a legal right to vote

Other hypernyms of crossover voter include voter.

crossover voter (noun)	elector (noun)
a voter who is registered as a member of one political party but who votes in the primary of another party	a citizen who has a legal right to vote