Eastern hemlock and Hemlock tree

Eastern hemlock noun - Common forest tree of the eastern United States and Canada; used especially for pulpwood.

Hemlock tree and eastern hemlock are semantically related. In some cases you can use "Hemlock tree" instead a noun phrase "Eastern hemlock".

Hemlock tree noun - An evergreen tree.

Eastern hemlock and hemlock tree are semantically related. Sometimes you can replace phrase "Eastern hemlock" with "Hemlock tree", this phrases are similar.