grievous bodily harm vs GHB

grievous bodily harm and GHB both are nouns.

Word	Noun	Adjective	Verb	Adverb
grievous bodily harm	Yes	No	No	No
GHB	Yes	No	No	No

As nouns, GHB is a hypernym of grievous bodily harm; that is, GHB is a word with a broader meaning than grievous bodily harm:

grievous bodily harm: street names for gamma hydroxybutyrate
GHB: a club drug available in liquid or powder form is taken orally (frequently combined with alcohol); used to incapacitate individuals for the commission of sexual assault and rape

Other hypernyms of grievous bodily harm include gamma hydroxybutyrate.

grievous bodily harm (noun)	GHB (noun)
street names for gamma hydroxybutyrate	a club drug available in liquid or powder form is taken orally (frequently combined with alcohol); used to incapacitate individuals for the commission of sexual assault and rape