Northern pin oak and Oak tree

Northern pin oak noun - Small to medium deciduous oak of east central North America; leaves have sharply pointed lobes.

Oak tree and northern pin oak are semantically related. In some cases you can use "Oak tree" instead a noun phrase "Northern pin oak".

Oak tree noun - A deciduous tree of the genus Quercus; has acorns and lobed leaves.

Northern pin oak and oak tree are semantically related. Sometimes you can replace phrase "Northern pin oak" with "Oak tree", this phrases are similar.