Scots pine vs Scotch fir

Scots pine and Scotch fir both are nouns.

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

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

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

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

Scots pine (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