straight ticket vs voting

straight ticket and voting both are nouns.

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

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

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

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

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