en subterranean river (n)
― IsA ⟶
Weight: 1.0
en underground source of water (n) Source: OpenCyc 2012
en underground source of water (n)
― IsA ⟶
Weight: 1.0
en tangible thing (n) Source: OpenCyc 2012
en underground source of water (n)
― IsA ⟶
Weight: 1.0
en natural reservoir (n) Source: OpenCyc 2012