memorialisation vs ceremonial

memorialisation and ceremonial both are nouns.

Word	Noun	Adjective	Verb	Adverb
memorialisation	Yes	No	No	No
ceremonial	Yes	Yes	No	No

As nouns, ceremonial is a hypernym of memorialisation; that is, ceremonial is a word with a broader meaning than memorialisation:

Other hypernyms of memorialisation include ceremonial occasion, ceremony, observance.

memorialisation (noun)	ceremonial (noun)
a ceremony to honor the memory of someone or something	a formal event performed on a special occasion

memorialisation (adjective)	ceremonial (adjective)
	marked by pomp or ceremony or formality