insulin shock vs shock therapy

insulin shock and shock therapy both are nouns.

Word	Noun	Adjective	Verb	Adverb
insulin shock	Yes	No	No	No
shock therapy	Yes	No	No	No

As nouns, shock therapy is a hypernym of insulin shock; that is, shock therapy is a word with a broader meaning than insulin shock:

insulin shock: the administration of sufficient insulin to induce convulsions and coma
shock therapy: treatment of certain psychotic states by the administration of shocks that are followed by convulsions

Other hypernyms of insulin shock include shock treatment.

insulin shock (noun)	shock therapy (noun)
the administration of sufficient insulin to induce convulsions and coma	treatment of certain psychotic states by the administration of shocks that are followed by convulsions
hypoglycemia produced by excessive insulin in the system causing coma