Scotch fir vs Scots pine

Scotch fir and Scots pine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Scotch fir	Yes	No	No	No
Scots pine	Yes	No	No	No

As nouns, Scotch fir and Scots pine are synonyms defined as:

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

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

Scotch fir (noun)	Scots pine (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