festschrift vs memorial

festschrift and memorial both are nouns.

Word	Noun	Adjective	Verb	Adverb
festschrift	Yes	No	No	No
memorial	Yes	No	No	No

As nouns, memorial is a hypernym of festschrift; that is, memorial is a word with a broader meaning than festschrift:

Other hypernyms of festschrift include commemoration, remembrance.

festschrift (noun)	memorial (noun)
a collection of writings published in honor of a scholar	a structure erected to commemorate persons or events
	a recognition of meritorious service
	a written statement of facts submitted in conjunction with a petition to an authority