When we feel an intense rush of happiness, we may often describe it as feeling "flushed with joy." However, there are plenty of other synonyms that can capture this same feeling. For instance, we might describe feeling "overwhelmed with happiness," "brimming with joy," or "exuberant with delight." Alternatively, the intensity of the feeling could be emphasized with a phrase like "bursting with elation," "swimming in euphoria," or "floating on cloud nine." Ultimately, there are many different ways to express the sensation of being completely consumed by happiness - and different words may resonate with different people based on their unique experiences and emotions.