massif, mountain pass, notch, pass

adirondacks, adirondack mountains, alaska range, alleghenies, allegheny mountains, alps, andes, apennines, appalachians, appalachian mountains, balkans, balkan mountains, balkan mountain range, berkshires, berkshire hills, black hills, blue ridge mountains, cascades, cascade range, catskills, catskill mountains, caucasus, caucasus mountains, coast mountains, coast range, cumberland mountains, cumberland plateau, great smoky mountains, himalayas, himalaya mountains, hindu kush, hindu kush mountains, karakoram, karakoram range, karakorum range, kuenlun, kuenlun mountains, kunlun, kunlun mountains, mustagh, mustagh range, ozarks, ozark mountains, pyrenees, rockies, rocky mountains, sierra, sierra nevada, sierra nevada mountains, st. elias mountains, st. elias range, teton range, the alps, the himalaya, tien shan, tyan shan, urals, ural mountains

formation, geological formation, geology

chain, mountain chain, mountain range, range, range of mountains