en oil shale (n, substance)
― IsA ⟶
Weight: 2.0
en shale (n, substance) Source: Open Multilingual WordNet
en humic shale (n, substance)
― IsA ⟶
Weight: 2.0
en shale (n, substance) Source: Open Multilingual WordNet
en shale (n, substance)
― IsA ⟶
Weight: 2.0
en sedimentary rock (n, substance) Source: Open Multilingual WordNet
en shale (n)
― IsA ⟶
Weight: 1.0
en clastic sedimentary rock (n) Source: OpenCyc 2012