S: (n) kind, sort, form, variety (a category of things distinguished by some common characteristic or quality) "sculpture is a form of art"; "what kinds of desserts are there?"
S: (n) category (a general concept that marks divisions or coordinations in a conceptual scheme)
S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
S: (n) stripe, streak, bar (a narrow marking of a different color or texture from the background) "a green toad with small black stripes or bars"; "may the Stars and Stripes forever wave"