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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

causal agent, cause, causal agency go
any entity that produces an effect or is responsible for events or results

agent go
a substance that exerts some force or effect

drug go
a substance that is used as a medicine or narcotic

controlled substance go
a drug or chemical substance whose possession and use are controlled by law

hard drug
a narcotic that is considered relatively strong and likely to cause addiction

noun.artifact

2 Subcategories