Synonyms to block lava

basalt, aa, abyssal rock, bedrock, brash, breccia, conglomerate, crag, druid stone, festooned pahoehoe, gneiss, granite, igneous rock, lava, limestone, living rock, magma, mantlerock, metamorphic rock, monolith, pahoehoe, pillow lava, porphyry, pudding stone, regolith, rock, ropy lava, rubble, rubblestone, sandstone, sarsen, schist, scoria, scree, sedimentary rock, shelly pahoehoe, stone, talus, tufa, tuff, base, basement, basic, basis, bearing wall, bed, bedding, belly, bottom, bottom side, bottommost, breech, buttocks, central, deepest, downside, essential, floor, flooring, focal, fond, footing, foundation, fundament, fundamental, ground, grounds, groundwork, hardpan, indispensable, infrastructure, life-and-death, life-or-death, lower side, lower strata, lowest, lowest layer, lowest level, lowest point, material, nadir, nether side, nethermost, nethermost level, of vital importan