chanoyu vs ceremony

chanoyu and ceremony both are nouns.

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

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

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

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