Scotch fir vs Pinus sylvestris

Scotch fir and Pinus sylvestris both are nouns.

Word	Noun	Adjective	Verb	Adverb
Scotch fir	Yes	No	No	No
Pinus sylvestris	Yes	No	No	No

As nouns, Scotch fir and Pinus sylvestris are synonyms defined as:

Scotch fir and Pinus sylvestris: medium large two-needled pine of northern Europe and Asia having flaking red-brown bark

Other synonyms of Scotch fir include Scotch pine, Scots pine.

Scotch fir (noun)	Pinus sylvestris (noun)
medium large two-needled pine of northern Europe and Asia having flaking red-brown bark	medium large two-needled pine of northern Europe and Asia having flaking red-brown bark