Ash tree and Basket ash

Ash tree noun - Any of various deciduous pinnate-leaved ornamental or timber trees of the genus Fraxinus.

Basket ash and ash tree are semantically related. In some cases you can replace phrase "Basket ash" with "Ash tree", this phrases are similar.

Basket ash noun - Vigorous spreading North American tree having dark brown heavy wood; leaves turn gold in autumn.

Ash tree and basket ash are semantically related. You can use "Ash tree" instead a noun phrase "Basket ash".