black pine vs pine tree

black pine and pine tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
black pine	Yes	No	No	No
pine tree	Yes	No	No	No

As nouns, pine tree is a hypernym of black pine; that is, pine tree is a word with a broader meaning than black pine:

black pine: tall symmetrical pine of western North America having long blue-green needles in bunches of 3 and elongated cones on spreading somewhat pendulous branches; sometimes classified as a variety of ponderosa pine
pine tree: a coniferous tree

Other hypernyms of black pine include pine, true pine.

As nouns, pine tree is a hypernym of black pine; that is, pine tree is a word with a broader meaning than black pine:

black pine: large Japanese ornamental having long needles in bunches of 2; widely planted in United States because of its resistance to salt and smog
pine tree: a coniferous tree

Other hypernyms of black pine include pine, true pine.

As nouns, pine tree is a hypernym of black pine; that is, pine tree is a word with a broader meaning than black pine:

Other hypernyms of black pine include pine, true pine.

black pine (noun)	pine tree (noun)
New Zealand conifer used for lumber; the dark wood is used for interior carpentry	a coniferous tree
conifer of Australia and New Zealand
tall symmetrical pine of western North America having long blue-green needles in bunches of 3 and elongated cones on spreading somewhat pendulous branches; sometimes classified as a variety of ponderosa pine
large Japanese ornamental having long needles in bunches of 2; widely planted in United States because of its resistance to salt and smog
large two-needled timber pine of southeastern Europe