Membranophone and Side drum

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

Side drum and membranophone are semantically related. In some cases you can replace phrase "Side drum" with "Membranophone", this terms are similar.

Side drum noun - A small drum with two heads and a snare stretched across the lower head.

Membranophone and side drum are semantically related. You can use "Membranophone" instead a noun phrase "Side drum".