Annulate is a term that refers to a structure or object that has a ring-like appearance. Synonyms for annulate include circular, ringed, looped, coiled, spiraled, rounded, circled, wavy, and curved. These words are often used to describe natural phenomena, such as the ridges on a tree trunk, the waves of the ocean, or the curling petals of a flower. They can also be used to refer to man-made objects, such as a circular bracelet or a looped necklace. Whether describing the natural world or human creations, these synonyms for annulate offer a rich vocabulary for expressing the ring-like shapes around us.