Rise up is a common phrase that describes an action of standing up, elevating, ascending, or improving. There are many synonyms for the phrase, including arise, ascend, climb, mount, soar, lift, surge, escalate, grow, increase, and advance. "Arise" may be used to indicate waking up from sleep or standing up from a seat. "Climb" and "mount" suggest moving upward on a steep surface or hill. "Soar" and "lift" convey a sense of grace and elevation. "Surge" and "escalate" indicate sudden or rapid increases, while "grow" and "advance" imply gradual progress. All these synonyms depict different ways of "rising up" and can be used to add variety and depth to your writing.