funeral vs ceremonial

funeral and ceremonial both are nouns.

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

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

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

funeral (noun)	ceremonial (noun)
a ceremony at which a dead person is buried or cremated	a formal event performed on a special occasion

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