tom-tom vs tympan

tom-tom and tympan both are nouns.

Word	Noun	Adjective	Verb	Adverb
tom-tom	Yes	No	No	No
tympan	Yes	No	No	No

As nouns, tympan is a hypernym of tom-tom; that is, tympan is a word with a broader meaning than tom-tom:

tom-tom: any of various drums with small heads
tympan: a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched across each end

Other hypernyms of tom-tom include drum, membranophone.

tom-tom (noun)	tympan (noun)
any of various drums with small heads	a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched across each end