shore pine vs pine tree

shore pine and pine tree both are nouns.

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

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

shore pine: shrubby two-needled pine of coastal northwestern United States; red to yellow-brown bark fissured into small squares
pine tree: a coniferous tree

Other hypernyms of shore pine include pine, true pine.

shore pine (noun)	pine tree (noun)
shrubby two-needled pine of coastal northwestern United States; red to yellow-brown bark fissured into small squares	a coniferous tree