skag vs diacetylmorphine

skag and diacetylmorphine both are nouns.

Word	Noun	Adjective	Verb	Adverb
skag	Yes	No	No	No
diacetylmorphine	Yes	No	No	No

As nouns, diacetylmorphine is a hypernym of skag; that is, diacetylmorphine is a word with a broader meaning than skag:

skag: street names for heroin
diacetylmorphine: 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 skag include heroin.

skag (noun)	diacetylmorphine (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