The term "game-changer" is widely used to describe something that causes a significant change in a situation. However, there are many other words that can be used to convey a similar meaning. For instance, the term "disruptor" can be used to describe something that causes a major upheaval in a particular industry or market. The term "innovator" can describe someone or something that introduces new ideas or technologies that significantly alter the status quo. Similarly, the term "transformer" can be used to describe something that causes a fundamental change in a situation, while "revolutionizer" can describe someone who initiates major changes or overhauls in a given field. Using these alternative terms can help to add variety and nuance to one's vocabulary.