Epithalamium is a poetic form that is typically used to celebrate a wedding or marriage ceremony. The word derives from the Greek word "epithalamion," which literally means "wedding song." However, there are several synonyms that can be used to describe this type of poem, including "nuptial ode," "marriage song," "bridal hymn," and "wedding ode." Other related terms include "wedding poem," "marriage celebration," and "bridal tribute." Regardless of what you call it, the epithalamium serves as a beautiful expression of love and commitment between two individuals, making it a cherished tradition in many cultures around the world.