The term 'Sound of Surf' can be described by two crossword solutions: 'ROAR' and 'ROTE'. ROAR is a deep, loud, and often intimidating sound that is usually associated with large animals such as lions or tigers. ROTE is a memorization technique that involves repeating something over and over again until it is committed to memory. Together, these two words describe the sound of surf, which is a combination of a deep, loud ROAR and a repetitive sound.