Anulus is a Latin word that refers to a ring or a circular object. Synonyms for anulus include circle, ring, loop, round, hoop, band, disc, orifice, and aperture. These words are used to describe objects or shapes that are circular or rounded. Circle refers to a perfect round shape, while ring is used to describe a circular object that is used as an ornament or for holding something. Hoop is used to describe the circular shape of an object, while band refers to a thin strip, especially a metallic one. Disc and orifice refer to circular openings, while aperture is a more general term used to describe any opening or gap.