The term 'Symbol of Happiness' can be represented by four different words: Bluebird (8 letters), LARK (4 letters), CLAM (4 letters), and Smileyface (10 letters). The bluebird is a small, colorful bird that is often associated with joy and happiness. The LARK is a small songbird that is known for its cheerful singing. Clams are bivalve mollusks that are often seen as symbols of good luck. Finally, the Smileyface is a popular symbol of happiness, often used in emoticons and other forms of communication.