phencyclidine vs hallucinogen

phencyclidine and hallucinogen both are nouns.

Word	Noun	Adjective	Verb	Adverb
phencyclidine	Yes	No	No	No
hallucinogen	Yes	No	No	No

As nouns, hallucinogen is a hypernym of phencyclidine; that is, hallucinogen is a word with a broader meaning than phencyclidine:

phencyclidine: a drug used as an anesthetic by veterinarians; illicitly taken (originally in the form of powder or `dust') for its effects as a hallucinogen
hallucinogen: a psychoactive drug that induces hallucinations or altered sensory experiences

Other hypernyms of phencyclidine include hallucinogenic drug, psychedelic drug, psychodelic drug.

phencyclidine (noun)	hallucinogen (noun)
a drug used as an anesthetic by veterinarians; illicitly taken (originally in the form of powder or `dust') for its effects as a hallucinogen	a psychoactive drug that induces hallucinations or altered sensory experiences