psilocyn vs hallucinogenic drug

psilocyn and hallucinogenic drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
psilocyn	Yes	No	No	No
hallucinogenic drug	Yes	No	No	No

As nouns, hallucinogenic drug is a hypernym of psilocyn; that is, hallucinogenic drug is a word with a broader meaning than psilocyn:

psilocyn: a substituted tryptamine alkaloid and a serotonergic psychedelic substance, present in most psychedelic mushrooms together with its phosphorylated counterpart psilocybin.
hallucinogenic drug: a psychoactive drug that induces hallucinations or altered sensory experiences

Other hypernyms of psilocyn include hallucinogen, psychedelic drug, psychodelic drug, alkaloid.

psilocyn (noun)	hallucinogenic drug (noun)
a substituted tryptamine alkaloid and a serotonergic psychedelic substance, present in most psychedelic mushrooms together with its phosphorylated counterpart psilocybin.	a psychoactive drug that induces hallucinations or altered sensory experiences