Silver oak and Silk oak

Silver oak noun - Small slender tree with usually entire grey-green pendulous leaves and white or cream-colored flowers; northern Australia.

Silk oak and silver oak are semantically related. In some cases you can use "Silk oak" instead a noun phrase "Silver oak".

Silk oak noun - Any of several Australian timber trees having usually fernlike foliage and mottled wood used in cabinetry and veneering.

Silver oak and silk oak are semantically related. Sometimes you can replace phrase "Silver oak" with "Silk oak", this phrases are similar.