Flowering tree and Silk-cotton tree

Flowering tree noun - Any tree having seeds and ovules contained in the ovary.

Silk-cotton tree and flowering tree are semantically related. In some cases you can replace phrase "Silk-cotton tree" with "Flowering tree", this phrases are similar.

Silk-cotton tree noun - Massive tropical tree with deep ridges on its massive trunk and bearing large pods of seeds covered with silky floss; source of the silky kapok fiber.

Flowering tree and silk-cotton tree are semantically related. You can use "Flowering tree" instead a noun phrase "Silk-cotton tree".