Pine tree and Shore pine

Pine tree noun - A coniferous tree.

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

Shore pine noun - Shrubby two-needled pine of coastal northwestern United States; red to yellow-brown bark fissured into small squares.

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