circumstance vs ceremony

circumstance and ceremony both are nouns.

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

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

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

circumstance (noun)	ceremony (noun)
information that should be kept in mind when making a decision	the proper or conventional behavior on some solemn occasion
formal ceremony about important occasions	any activity that is performed in an especially solemn elaborate or formal way
a condition that accompanies or influences some event or activity	a formal event performed on a special occasion
the set of facts or circumstances that surround a situation or event