The word "up-rears" can be replaced with a variety of synonyms. "Rears up" is a close match, with both words conveying the action of something or someone rising up. Other similar phrases include "stands up," "lifts up," or "ascends." If the intention is to imply a sense of urgency or surrender, alternatives like "raises hands," "submits," or "concedes" can be used. Additionally, "uplift" or "heighten" can work as synonyms for "up-rears" in a metaphorical sense, to describe an increase or improvement in something, such as a person's mood or a project's progress.