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"
W: (n) mottling [Related to: mottle] (the act of coloring with areas of different shades)
W: (n) streak [Related to: streak] (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"