Synonyms and related words :
beam, beaming, beatific, beatified, blessed, blissful, blithe, blithesome, bright, bright and sunny, bright smile, broad grin, capering, cheerful, cheery, chirping, dancing, ear-to-ear grin, elated, eupeptic, euphoric, exalted, exhilarated, flushed, flushed with joy, gay, genial, glad, gladsome, gleaming smile, glowing, glowing smile, grin, grinning, happy, high, hopeful, idiotic grin, in good spirits, in high spirits, irrepressible, joyful, joyous, laughing, leaping, of good cheer, optimistic, pleasant, purring, radiant, riant, rosy, sanguine, sanguineous, sardonic grin, simper, singing, smile, smirk, smirking, sparkling, starry-eyed, stupid grin, sunny, thrice happy, toothful grin, winsome