angel dust vs psychodelic drug

angel dust and psychodelic drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
angel dust	Yes	No	No	No
psychodelic drug	Yes	No	No	No

As nouns, psychodelic drug is a hypernym of angel dust; that is, psychodelic drug is a word with a broader meaning than angel dust:

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

Other hypernyms of angel dust include hallucinogen, hallucinogenic drug, psychedelic drug.

angel dust (noun)	psychodelic drug (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