ceremony vs ceremonial

ceremony and ceremonial both are nouns.

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

As nouns, ceremony and ceremonial are synonyms defined as:

Other synonyms of ceremony include ceremonial occasion, observance.

ceremony (noun)	ceremonial (noun)
the proper or conventional behavior on some solemn occasion	a formal event performed on a special occasion
any activity that is performed in an especially solemn elaborate or formal way
a formal event performed on a special occasion

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