memorial vs festschrift

memorial and festschrift both are nouns.

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

As nouns, festschrift is a hyponym of memorial; that is, festschrift is a word with a more specific, narrower meaning than memorial:

Other hyponyms of memorial include epitaph.

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