Came on to is a phrase commonly used to describe a person's behavior when they express sexual interest in someone. There are a variety of synonyms for this phrase, including flirting, hitting on, making advances, making a pass, pursuing, and wooing. Each of these phrases can be used in various contexts to describe different levels of romantic or sexual interest. For example, flirting may be a more playful or subtle approach compared to making a pass, which may be a more direct and explicit expression of desire. Choosing the right synonym for came on to can help convey a specific tone or intention.