The phrase "in power" implies that a person or group has authority, control, or influence over a situation. It can also refer to political leadership or being in a position of dominance. There are various synonyms for this phrase, including "in control," "at the helm," "in authority," "holding sway," or "having the upper hand." Additionally, words like "dominant," "strong," "ruling," and "supreme" can be used as alternatives to describe someone in power. These terms can also be applied to describe countries, organizations, or institutions that hold significant influence and control over different aspects of society, politics, or culture.