Pine tree and White pine

Pine tree noun - A coniferous tree.

White pine and pine tree are semantically related. In some cases you can replace phrase "White pine" with "Pine tree", this phrases are similar.

White pine noun - Any of several five-needled pines with white wood and smooth usually light grey bark when young; especially the eastern white pine.

Pine tree and white pine are semantically related. You can use "Pine tree" instead a noun phrase "White pine".