memorial tablet vs memorial

memorial tablet and memorial both are nouns.

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

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

Other hypernyms of memorial tablet include monument.

memorial tablet (noun)	memorial (noun)
a memorial made of brass	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