upvote vs ballot

upvote and ballot both are nouns.

Word	Noun	Adjective	Verb	Adverb
upvote	Yes	No	Yes	No
ballot	Yes	No	Yes	No

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

upvote: A positive vote on a social media website
ballot: a choice that is made by counting the number of people in favor of each alternative

Other hypernyms of upvote include balloting, vote, voting.

upvote (noun)	ballot (noun)
A positive vote on a social media website	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

upvote (verb)	ballot (verb)
To vote positively on a social media website	vote by ballot