Winner
Victor
noun
Someone who wins is the winner / victor.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
このレースの勝者はお金がもらえますよ。
The winners of this race will get some money.
勝者だけが次のステージにすすめます。
Only the winner can proceed to the next stage.
有名な大学に行ったら人生の勝者になれるだなんて考え方、古いですよ。
The idea that going to a famous university will make you a winner in life is an old way of thinking.