heroin vs nose drops

heroin and nose drops both are nouns.

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

As nouns, nose drops is a hyponym of heroin; that is, nose drops is a word with a more specific, narrower meaning than heroin:

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

Other hyponyms of heroin include big H, hell dust, scag, skag, smack, thunder.

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