multiple voting vs ballot

multiple voting and ballot both are nouns.

Word	Noun	Adjective	Verb	Adverb
multiple voting	Yes	No	No	No
ballot	Yes	No	Yes	No

As nouns, ballot is a hypernym of multiple voting; that is, ballot is a word with a broader meaning than multiple voting:

multiple voting: the act of voting in more than one place by the same person at the same election (illegal in U.S.)
ballot: a choice that is made by counting the number of people in favor of each alternative

Other hypernyms of multiple voting include balloting, vote, voting.

multiple voting (noun)	ballot (noun)
the act of voting in more than one place by the same person at the same election (illegal in U.S.)	a choice that is made by counting the number of people in favor of each alternative
	a document listing the alternatives that is used in voting

multiple voting (verb)	ballot (verb)
	vote by ballot