The phrase "sweat brow" is commonly used to describe someone who is working hard and perspiring heavily. However, there are several synonyms that can be used instead of this phrase. These include "perspiration," "sweat drops," "beads of sweat," "sweaty forehead," and "moist forehead." Each of these phrases conveys the same idea of someone working hard and exerting themselves physically, but they provide a different way to describe that action. By using these synonyms, writers can add variety to their work and avoid repetition of the same phrase.