A ribbon lake is a long and narrow lake that results from glacier erosion. These types of lakes are often surrounded by steep hills and cliffs and can be found in mountainous regions. Synonyms for ribbon lake include finger lake, trough lake, and valley lake. Finger lake is a term used for a lake that looks like a finger due to its long and narrow shape, while trough lake refers to a lake that lies in a geological trough or depression. Valley lake, on the other hand, is a term used for a lake that lies in a valley formed by glacial or tectonic activities. Each of these terms represents a different type of ribbon lake, but they all share the same characteristics of a long and narrow body of water in a mountainous region.