silver pine vs Pinus monticola

silver pine and Pinus monticola both are nouns.

Word	Noun	Adjective	Verb	Adverb
silver pine	Yes	No	No	No
Pinus monticola	Yes	No	No	No

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

silver 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 silver pine include mountain pine, western white pine.

silver 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
timber tree of New Zealand having shiny white wood