The phrase "close ranks" refers to a situation where people or a group come together tightly to protect themselves from outside attacks or criticisms. Some synonyms for this phrase include "rally," which means to come together in support of a specific cause or person, "unite," which suggests people joining forces for a shared objective, and "solidify," which implies a strengthening of bonds or relationships. Other related words include "band together," "stand firm," and "circle the wagons." These terms all convey the idea of a group standing together and forming a united front against adversity.