When it comes to expressing happiness, there are many synonyms that can be used in place of "is happy." Some great options include "is overjoyed," "is elated," "is thrilled," "is ecstatic," "is delighted," "is beaming," "is gleeful," "is jubilant," "is euphoric," and "is in high spirits." Each of these alternatives can add a unique flair to your writing, depending on the tone you're going for. Whether you're writing a personal essay, a creative piece of fiction, or a professional report, using a variety of diverse and descriptive synonyms will help to make your writing more engaging and effective.