Scotch fir vs pine

Scotch fir and pine both are nouns.

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

As nouns, pine is a hypernym of Scotch fir; that is, pine is a word with a broader meaning than Scotch fir:

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

Other hypernyms of Scotch fir include pine tree, true pine.

Scotch fir (noun)	pine (noun)
medium large two-needled pine of northern Europe and Asia having flaking red-brown bark	a coniferous tree
	straight-grained durable and often resinous white to yellowish timber of any of numerous trees of the genus Pinus

Scotch fir (verb)	pine (verb)
	have a desire for something or someone who is not present