The term 'walked heavily' can be described in several ways. TRAMPED, which has seven letters, means to walk heavily and with a lot of effort. TROD, which also has seven letters, means to walk heavily and with a lot of force. TROT, which has four letters, means to walk quickly with short steps. CLUMPED, which has seven letters, means to walk heavily and with a dragging motion. Slogged, which also has seven letters, means to walk heavily and with a slow, steady pace. All of these words describe the action of walking heavily in different ways.