Nodosity refers to the presence of a knot or a swelling in a particular area. Some of the synonyms for nodosity include bump, lump, nodule, protuberance, and swelling. These words are used to describe the shape and size of the mass and can be used interchangeably with nodosity. Other synonyms for nodosity include knot, bulge, growth, tumor, and lesion. Each of these synonyms varies in connotation and medical definition, but they all relate to the presence of an abnormality on the body. Whether you use nodosity or one of its synonyms, these words can help identify and describe physical abnormalities.