Busted in is a verb phrase that means to enter a room or premises suddenly and forcefully, often without permission. However, there are several synonyms to this term that can be used to convey the same meaning. The most common synonyms include barged in, burst in, crashed in, stormed in, and broke in. These synonyms are often used interchangeably depending on the context in which they are used. If you want to describe someone's forceful entry into a room or a building, you can choose any of these synonyms to convey your message effectively.