Ridge is a type of landform that is characterized by an elongated CREST or top. PRECIPICE is a steep, vertical, or overhanging face of a rock or cliff. WRINKLE is a line or fold in the skin caused by aging or facial expressions. SPINE is the series of vertebrae extending from the neck to the tailbone in humans and other vertebrates. CHINE is a sharp ridge formed by two slopes of a roof meeting at the apex. WELT is a raised or reinforced strip of material used in sewing or carpentry. FURROW is a long, narrow trench made in the ground by a plow. HOGBACK is a long, narrow ridge of hills or mountains. RIB is one of the curved bones that form the skeleton of the chest in humans and other vertebrates. HILL is a natural ELEVATION of the earth's surface, smaller than a mountain. ELEVATION is the height above a given level, especially sea level. WALE is a long, narrow ridge on the surface of cloth, wood, or metal. CREASE is a line or fold made by pressing, folding, or crumpling. Riva is a narrow strip of land separating two bodies of water. SEAM is a line where two pieces of fabric are sewn together. Vimy is a ridge in northern France, site of a major battle in World War I. Aretes are sharp ridges between two glaciers or valleys. CREST is the highest or most important point or part of something. LEDGE is a narrow shelf of rock projecting from a cliff or wall. Stria is a thin, linear marking or band, especially on rock or bone. SIERRA is a mountain range with jagged peaks.