Champion 為贏得比賽的那位冠軍，用來指在比賽中脫穎而出的人物；championship 指的是優勝的地位，代表獎項或頭銜：
He was the champion. 他是冠軍
He won the championship. 他贏得冠軍盃
Championship 亦有「冠軍大賽」的意思，一般的運動比賽，都是 championship。但是學生常誤把 championship 和 games 合用，造成語意上的重複：
*In his senior year, he captained his school-Palo Alto High School and led them to win the championship of the state games.
句中的 games 和 championship 兩者是重複的概念，擇一而用即可：
In his senior year, he captained his school team – Palo Alto High School and led them to win the state championship/ state games.