Iridial is an adjective that describes something relating to the iris, which is the colored part of the eye that surrounds the pupil. Some synonyms for iridial could be iridal, iridescent, iridescence, iridian, or iridaceous. All of these words relate to the same idea of something being reflective or having a rainbow-like spectrum of colors. These words can be used in various contexts, such as when describing the appearance of a gemstone or the coloration of different types of birds. By using synonyms for iridial, writers and speakers can add variation and clarity to their language and keep their descriptions fresh and engaging.