ceremony vs chanoyu

ceremony and chanoyu both are nouns.

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

As nouns, chanoyu is a hyponym of ceremony; that is, chanoyu is a word with a more specific, narrower meaning than ceremony:

ceremony: any activity that is performed in an especially solemn elaborate or formal way
chanoyu: an ancient ritual for preparing and serving and drinking tea

Other hyponyms of ceremony include tea ceremony.

ceremony (noun)	chanoyu (noun)
the proper or conventional behavior on some solemn occasion	an ancient ritual for preparing and serving and drinking tea
any activity that is performed in an especially solemn elaborate or formal way
a formal event performed on a special occasion