The term 'BABY SOUND' can be represented by three crossword solutions: MEWL (4 letters), COO (3 letters), and GURGLE (6 letters). MEWL is a soft, high-pitched cry made by a baby, usually to express hunger or discomfort. COO is a low, gentle sound made by a baby, often to express contentment. GURGLE is a bubbly, throaty sound made by a baby, usually when they are happy or excited. All of these sounds are common in babies and are used to express their emotions.