[n] a steep rugged rock or cliff
aa, abyssal rock, basalt, bedrock, block lava, bluff, brash, breccia, cliff, cog, comb, conglomerate, druid stone, escarpment, face, fang, festooned pahoehoe, gneiss, granite, harrow, igneous rock, jag, lava, limestone, living rock, magma, mantlerock, met