Nonskeletal refers to something that is not related to or does not involve the skeleton. Synonyms for nonskeletal include extraneous, non-osseous, non-bone, non-skeletal, non-cartilaginous, non-joint, non-ligamentous, non-musculoskeletal, non-sinewy, non-tendinous, non-calcified, non-sciatic, non-spinal, and non-vertebral. These words can be used to describe any part of the body or system that is not directly related to the skeletal system, such as organs, tissues, and cells. Using these synonyms can help to add variety and depth to your writing, allowing you to convey your meaning more clearly and accurately.