regurgitation vs reminiscence

regurgitation and reminiscence both are nouns.

Word	Noun	Adjective	Verb	Adverb
regurgitation	Yes	No	No	No
reminiscence	Yes	No	No	No

As nouns, reminiscence is a hypernym of regurgitation; that is, reminiscence is a word with a broader meaning than regurgitation:

regurgitation: recall after rote memorization
reminiscence: the process of remembering (especially the process of recovering information by mental effort)

Other hypernyms of regurgitation include recall, recollection.

regurgitation (noun)	reminiscence (noun)
the reflex act of ejecting the contents of the stomach through the mouth	the process of remembering (especially the process of recovering information by mental effort)
recall after rote memorization	a mental impression retained and recalled from the past
backflow of blood through a defective heart valve