The term 'TOP OF THE MOUTH' can be solved by the four-letter word 'ROOF'. The ROOF of the mouth is the upper part of the oral cavity, which is divided into two parts: the hard palate and the soft palate. The hard palate is the bony front portion of the ROOF of the mouth, while the soft palate is the fleshy back portion. The ROOF of the mouth also contains the uvula, which is a small fleshy projection that hangs down from the middle of the soft palate.