Janitors' tools typically include MOPS, which is a four-letter word in this crossword. MOPS are cleaning tools used to clean floors, usually made of absorbent materials such as cotton, microfiber, or synthetic fibers. They are often attached to a handle and used with a cleaning solution to remove dirt and debris from floors. Janitors may also use other tools such as brooms, dustpans, and vacuum cleaners to help keep their work areas clean.