The phrase "wear on" refers to the passage of time or gradual progress of something over time. Synonyms for this phrase include "drag on", "tick away", "creep by", "pass slowly", "linger on", "persevere", and "persist". These synonyms can be used to describe the slow process of waiting for something, such as time passing during a boring meeting or the lengthy wait in a doctor's office. "Wear on" can also describe the gradual breaking down or deterioration of an object or material over time, which can be synonymous with "degrade", "corrode", "erode", and "deteriorate". Overall, synonyms for "wear on" describe the slow, steady process of time and change.