Pinus sylvestris vs Scotch fir

Pinus sylvestris and Scotch fir both are nouns.

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

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

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

Other synonyms of Pinus sylvestris include Scotch pine, Scots pine.

Pinus sylvestris (noun)	Scotch fir (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