Isomerous is a technical term that refers to organisms that have similar quantities of body parts arranged in the same pattern. Some synonyms for isomerous include equitant, equuscriptive, and zygomorphic. Equitant means overlapping, and it is often used in reference to the arrangement of leaves on a stem. Equuscriptive is another technical term that describes the symmetry of flowers, where the petals are of equal size and shape. Zygomorphic refers to organisms that have a single plane of symmetry, much like the shape of a human face. While these terms may not be as commonly used as isomerous, they provide specific descriptions of the symmetry and pattern of body parts in organisms.