bedrock Synonyms - page 2

undercarriage pillow lava lithosphere solid bottom rubblestone backbone essence essential floor footing foundation fundament fundamental gabbro gneiss granite ground crux core cobblestone base baseboard basement bases basis bed bedplate bottom boulder centerpiece centrepiece groundsel groundsill pahoehoe pavement plinth porphyry principia principle quartzite radix riprap roc rock nidus nethermost nadir groundwork hardpan heart