"Go fast" is a phrase that implies quickness, speed, and urgency. If you wish to add variety to your vocabulary, you can use synonyms of "go fast" to express the same idea in different ways. Some synonyms of "go fast" can include hasten, accelerate, expedite, sprint, rush, race, zoom, and dart. These words can be used in a range of contexts, including sports, driving, and work-related conversations. The use of synonyms can help you to improve your writing, and can add depth and interest to the way you communicate. By utilizing synonyms, you can convey the same message in a more nuanced and creative manner.