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In good humor
Expressive of good humor
Fortunate or apt
happy generally suggests a feeling of great pleasure, contentment, etc. a happy marriage; glad implies more strongly an exultant feeling of joy your letter made her so glad, but both glad and happy are commonly used in merely polite formulas expressing gratification I'm glad, or happy, to have met you; cheerful implies a steady display of bright spirits, optimism, etc. he's always cheerful in the morning; joyful and joyous both imply great elation and rejoicing, the former generally because of a particular event, and the latter as a matter of usual temperament the joyful throngs, a joyous family
See happy in American Heritage Dictionary 4 Synonyms
See happy in Webster's New World Roget's A-Z Thesaurus II
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