circumstance vs ceremonial

circumstance and ceremonial both are nouns.

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

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

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

circumstance (noun)	ceremonial (noun)
information that should be kept in mind when making a decision	a formal event performed on a special occasion
formal ceremony about important occasions
a condition that accompanies or influences some event or activity
the set of facts or circumstances that surround a situation or event

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