pageant vs ceremonial

pageant and ceremonial both are nouns.

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

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

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

pageant (noun)	ceremonial (noun)
an elaborate representation of scenes from history etc; usually involves a parade with rich costumes	a formal event performed on a special occasion
a rich and spectacular ceremony

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