Another word for mountainous
mountainlike, mountain, with mountains, difficult, barbarous, wild, untamed, strange, remote, uncivilized, rude, crude, unpopulated, solitary, unfamiliar, hard to penetrate, isolated, steep, lofty, hilly, alpine, upland, aerial, elevated, volcanic, towering, ridged, craggy, cliffy, rugged; see also high 2, rocky.
Another word for mountainousadjective
Of extraordinary size and power:behemoth, Brobdingnagian, Bunyanesque, colossal, cyclopean, elephantine, enormous, gargantuan, giant, gigantesque, gigantic, herculean, heroic, huge, immense, jumbo, mammoth, massive, massy, mastodonic, mighty, monster, monstrous, monumental, prodigious, pythonic, stupendous, titanic, tremendous, vast. (Informal) walloping. (Slang) whopping. See big