Steel drum and Steel pan

Steel drum noun - A concave percussion instrument made from the metal top of an oil drum; has an array of flattened areas that produce different tones when struck (of Caribbean origin).

Steel pan and steel drum are semantically related. in percussion instrument topic. In some cases you can use "Steel pan" instead a noun phrase "Steel drum".

Steel drum and steel pan are semantically related. Sometimes you can replace phrase "Steel drum" with "Steel pan", this phrases are similar.