sedative drug vs street drug

sedative drug and street drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
sedative drug	Yes	No	No	No
street drug	Yes	No	No	No

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

sedative drug: a drug that reduces excitability and calms a person
street drug: a drug that is taken for nonmedicinal reasons (usually for mind-altering effects); drug abuse can lead to physical and mental damage and (with some substances) dependence and addiction

Other hypernyms of sedative drug include drug of abuse, medicament, medication, medicinal drug, medicine.

sedative drug (noun)	street drug (noun)
a drug that reduces excitability and calms a person	a drug that is taken for nonmedicinal reasons (usually for mind-altering effects); drug abuse can lead to physical and mental damage and (with some substances) dependence and addiction