memorialization vs ceremony

memorialization and ceremony both are nouns.

Word	Noun	Adjective	Verb	Adverb
memorialization	Yes	No	No	No
ceremony	Yes	No	No	No

As nouns, ceremony is a hypernym of memorialization; that is, ceremony is a word with a broader meaning than memorialization:

Other hypernyms of memorialization include ceremonial, ceremonial occasion, observance.

memorialization (noun)	ceremony (noun)
a ceremony to honor the memory of someone or something	the proper or conventional behavior on some solemn occasion
	any activity that is performed in an especially solemn elaborate or formal way
	a formal event performed on a special occasion