The term VAST PLAIN is a combination of two words, STEPPE (6 letters) and Plain (5 letters). A STEPPE is a large area of flat, grassy land with few trees, found in parts of Europe, Asia, and North America. It is similar to a prairie, but is typically drier and has shorter grasses. A plain is an area of flat land with few or no trees, usually found in low-lying areas. Together, the two words describe a large, flat, grassy area with few trees.