cornerstone Synonyms

groundwork fundament basis base foundation substructure substratum stone stiffener spanner principal constituent rudiment root rock radix quoin pyridine prop principle support underpinning fundamental point main ingredient key element central component foundations thymine rocks foundation stone Central Point Rock of Gibraltar ft knowledgeableness point of departure fundamental principle bedrock vaulting pivot pillar nucleus essential essence cynosure crux cornering core clef centrepiece centerpiece center