Answer: massifs

AnswerCrossword Clue
MASSIFSMountainous expanses
MASSIFSClusters of summits
MASSIFSMountain clusters
MASSIFSCompact groups of mountains
MASSIFSClusters of mountains
massifsMASSIF, a principal mountain mass
massifsA compact group of mountains, esp. one that is separate from other groups