There are several synonyms for the phrase "eject air," which refers to the act of forcefully expelling air from the lungs or another object. Some common synonyms for this phrase include exhale, blow, breathe out, expel, and emit. Each of these words conveys a sense of force and pressure, suggesting a sharp burst of air that can be heard or felt. Other synonyms for "eject air" might include release, discharge, or vent, which imply a more gradual or controlled flow of air. Ultimately, the choice of synonym will depend on the context and intended meaning of the phrase.