Big leaguer is a term used to describe someone who is a professional player in a major sport, such as baseball or football. There are many synonyms for this term that can be used to describe these athletes. Some of these synonyms include professional athlete, sports star, superstar, all-star, elite athlete, champion, top athlete, and major leaguer. These synonyms can be used interchangeably to describe the same group of exceptional athletes who have made it to the top of their respective sports. Whether you are looking to describe a baseball star, football quarterback, or basketball player, these synonyms can be used to convey their status as the best of the best.