nose drops vs heroin

nose drops and heroin both are nouns.

Word	Noun	Adjective	Verb	Adverb
nose drops	Yes	No	No	No
heroin	Yes	No	No	No

As nouns, heroin is a hypernym of nose drops; that is, heroin is a word with a broader meaning than nose drops:

nose drops: street names for heroin
heroin: a narcotic that is considered a hard drug; a highly addictive morphine derivative; intravenous injection provides the fastest and most intense rush

Other hypernyms of nose drops include diacetylmorphine.

nose drops (noun)	heroin (noun)
street names for heroin	a narcotic that is considered a hard drug; a highly addictive morphine derivative; intravenous injection provides the fastest and most intense rush