pitch pine vs true pine

pitch pine and true pine both are nouns.

Word	Noun	Adjective	Verb	Adverb
pitch pine	Yes	No	No	No
true pine	Yes	No	No	No

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

pitch pine: large three-needled pine of the eastern United States and southeastern Canada; closely related to the pond pine
true pine: a coniferous tree

Other hypernyms of pitch pine include pine, pine tree.

pitch pine (noun)	true pine (noun)
large three-needled pine of the eastern United States and southeastern Canada; closely related to the pond pine	a coniferous tree
large three-needled pine of southeastern United States having very long needles and gnarled twisted limbs; bark is red-brown deeply ridged; an important timber tree