rumination vs disgorgement

rumination and disgorgement both are nouns.

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

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

rumination: regurgitation of small amounts of food; seen in some infants after feeding
disgorgement: the reflex act of ejecting the contents of the stomach through the mouth

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

rumination (noun)	disgorgement (noun)
regurgitation of small amounts of food; seen in some infants after feeding	the reflex act of ejecting the contents of the stomach through the mouth
(of ruminants) chewing (the cud)
a calm, lengthy, intent consideration