The term 'Merry Sounds' can be broken down into two crossword solutions: HAHA (4 letters) and HAHAS (5 letters). HAHA is an expression of laughter, usually used to indicate amusement or joy. It is often used in response to something funny or humorous. HAHAS is the plural form of HAHA, indicating multiple instances of laughter. Both terms are commonly used in everyday conversation and are associated with feelings of happiness and joy.