Cat lovers often look for synonyms for "happy kitten" to describe their beloved pets. Some of the synonyms that can be used for describing a happy kitten include cheerful, content, delighted, gleeful, joyful, jolly, pleased, satisfied and thrilled. These words describe the positive and joyful attitude of a kitten that is happy and content with life. Happy kittens are known to be playful and affectionate, which can be described with words like merry, lively, bubbly, frisky, frolicsome, and spunky. Each of these synonyms conveys a sense of happiness and playfulness that is typical of a healthy, content kitten.