en cornerstone (n, artifact)
― IsA ⟶
Weight: 2.0
en stone (n, artifact) Source: Open Multilingual WordNet
en cornerstone (n)
― IsA ⟶
Weight: 1.0
en block (n) Source: OpenCyc 2012
en cornerstone (n)
― IsA ⟶
Weight: 1.0
en part of building (n) Source: OpenCyc 2012