victor vs upsetter

victor and upsetter both are nouns.

Word	Noun	Adjective	Verb	Adverb
victor	Yes	No	No	No
upsetter	Yes	No	No	No

As nouns, upsetter is a hyponym of victor; that is, upsetter is a word with a more specific, narrower meaning than victor:

Other hyponyms of victor include contestee, medalist, medallist, walloper.

victor (noun)	upsetter (noun)
the contestant who wins the contest	an unexpected winner; someone who defeats the favorite competitor
a combatant who is able to defeat rivals