Cylindricity refers to the degree of conformity of a cylindrical shape to its intended geometry. Some synonyms for cylindricity are roundness, circularity, sphericity, concentricity, and straightness. Roundness is used to describe the degree of circularity of a cylindrical shape, while sphericity refers to the degree to which a sphere deviates from a perfect sphere. Concentricity describes the relationship between two or more cylindrical objects sharing the same axis, while straightness refers to the degree to which a cylindrical object is free from curvature or deviation from a straight line. These synonyms help to describe the geometry of a cylindrical object and are useful for measurement and comparison purposes.