tympani vs kettledrum

tympani and kettledrum both are nouns.

Word	Noun	Adjective	Verb	Adverb
tympani	Yes	No	No	No
kettledrum	Yes	No	No	No

As nouns, tympani and kettledrum are synonyms defined as:

tympani and kettledrum: a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it

Other synonyms of tympani include kettle, timpani, tympanum.

tympani (noun)	kettledrum (noun)
a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it	a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it