Peak range refers to a series of mountain tops that are linked together and form a continuous range. There are several synonyms for the term peak range, such as mountain range, mountain chain, sierra, and ridge. The term mountain range is broad and often used to refer to any series of mountains, while the term mountain chain indicates a more connected and continuous range. Sierra refers to a range of mountains with sharp peaks, while ridge focuses on the ridge-forming part of the mountain range. Each synonym emphasizes a different aspect of the peak range, but they all refer to the same geographical feature - a series of mountains that rise high above the surrounding landscape.