The term 'chain of ___' can refer to a number of different things. The crossword solutions for this term are LINK (4 letters), LINK hover:text-barberry-yellow'>SIERRA (6 letters), and LINK hover:text-barberry-yellow'>RIDGE (5 letters). A chain of links is a series of connected objects, such as a necklace or a bracelet. A chain of sierras is a mountain range with several peaks, often found in the western United States. A chain of ridges is a series of hills or mountains that form a line.