There are a number of synonyms for the phrase "seventh heaven," which is typically used to describe a state of extreme happiness or euphoria. One common alternative is "cloud nine," while others might say they are "over the moon" or "on top of the world." Some people might describe feeling "ecstatic," "blissful," or "delirious" when they are in a state of seventh heaven. Other options include "in rapture," "in ecstasy," "in paradise," or "in a state of bliss." Ultimately, the choice of words will depend on the individual and their personal experience of happiness or joy.