kettledrum vs timpani

kettledrum and timpani both are nouns.

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

As nouns, kettledrum and timpani are synonyms defined as:

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

Other synonyms of kettledrum include kettle, tympani, tympanum.

kettledrum (noun)	timpani (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