western white pine vs Pinus monticola

western white pine and Pinus monticola both are nouns.

Word	Noun	Adjective	Verb	Adverb
western white pine	Yes	No	No	No
Pinus monticola	Yes	No	No	No

As nouns, western white pine and Pinus monticola are synonyms defined as:

western white pine and Pinus monticola: tall pine of western North America with stout blue-green needles; bark is grey-brown with rectangular plates when mature

Other synonyms of western white pine include mountain pine, silver pine.

western white pine (noun)	Pinus monticola (noun)
tall pine of western North America with stout blue-green needles; bark is grey-brown with rectangular plates when mature	tall pine of western North America with stout blue-green needles; bark is grey-brown with rectangular plates when mature