The term 'laughing sound' can be represented by four different words: HEH (3 letters), HAHA (4 letters), HAR (3 letters), and TEHEE (5 letters). HEH is an expression of laughter that is often used to express mild amusement or surprise. HAHA is a more hearty laugh, usually used to express joy or amusement. HAR is a laugh that is often used to express sarcasm or disbelief. TEHEE is a laugh that is often used to express mischievousness or glee.