There are plenty of synonyms for the phrase "flush the morning," which typically means to rid oneself of sleepiness or fatigue upon waking up. Some of the more common synonyms include "wake up," "refresh," "revitalize," "rejuvenate," "energize," and "invigorate." Other synonyms that may be less commonly used but still work well include "awaken," "rouse," "animate," "stimulate," "exhilarate," and "animate." No matter what synonym one chooses to use, the main goal is the same: to shake off the tiredness or grogginess that can linger after a night's sleep and prepare oneself for the day ahead.