hyperemesis vs disgorgement

hyperemesis and disgorgement both are nouns.

Word	Noun	Adjective	Verb	Adverb
hyperemesis	Yes	No	No	No
disgorgement	Yes	No	No	No

As nouns, disgorgement is a hypernym of hyperemesis; that is, disgorgement is a word with a broader meaning than hyperemesis:

hyperemesis: severe and excessive vomiting
disgorgement: the reflex act of ejecting the contents of the stomach through the mouth

Other hypernyms of hyperemesis include emesis, puking, regurgitation, vomit, vomiting.

hyperemesis (noun)	disgorgement (noun)
severe and excessive vomiting	the reflex act of ejecting the contents of the stomach through the mouth