floating voter vs voter

floating voter and voter both are nouns.

Word	Noun	Adjective	Verb	Adverb
floating voter	Yes	No	No	No
voter	Yes	No	No	No

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

floating voter: a voter who has no allegiance to any political party and whose unpredictable decisions can swing the outcome of an election one way or the other
voter: a citizen who has a legal right to vote

Other hypernyms of floating voter include elector.

floating voter (noun)	voter (noun)
a voter who has no allegiance to any political party and whose unpredictable decisions can swing the outcome of an election one way or the other	a citizen who has a legal right to vote