Gran casa and Tympan

Gran casa noun - A large drum with two heads; makes a sound of indefinite but very low pitch.

Tympan and gran casa are semantically related. In some cases you can use "Tympan" instead a noun phrase "Gran casa".

Tympan noun - A musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched across each end.

Gran casa and tympan are semantically related. Sometimes you can replace phrase "Gran casa" with "Tympan", this terms are similar.