en opioid (n)
― IsA ⟶
Weight: 1.0
en analgesic (n) Source: OpenCyc 2012
en endogenous opioid peptide (n)
― IsA ⟶
Weight: 1.0
en opioid (n) Source: OpenCyc 2012
en opiate
― IsA ⟶
Weight: 1.0
en opioid (n) Source: English Wiktionary
en opioid drug (n)
― IsA ⟶
Weight: 1.0
en opioid (n) Source: OpenCyc 2012