split ticket vs voting

split ticket and voting both are nouns.

Word	Noun	Adjective	Verb	Adverb
split ticket	Yes	No	No	No
voting	Yes	No	No	No

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

split ticket: a ballot cast by a voter who votes for candidates from more than one party
voting: a choice that is made by counting the number of people in favor of each alternative

Other hypernyms of split ticket include ballot, balloting, vote.

split ticket (noun)	voting (noun)
a ballot cast by a voter who votes for candidates from more than one party	a choice that is made by counting the number of people in favor of each alternative