grey-leaf pine vs pine

grey-leaf pine and pine both are nouns.

Word	Noun	Adjective	Verb	Adverb
grey-leaf pine	Yes	No	No	No
pine	Yes	No	Yes	No

As nouns, pine is a hypernym of grey-leaf pine; that is, pine is a word with a broader meaning than grey-leaf pine:

grey-leaf pine: medium-sized five-needled pine of southwestern California having long cylindrical cones
pine: a coniferous tree

Other hypernyms of grey-leaf pine include pine tree, true pine.

grey-leaf pine (noun)	pine (noun)
medium-sized five-needled pine of southwestern California having long cylindrical cones	a coniferous tree
	straight-grained durable and often resinous white to yellowish timber of any of numerous trees of the genus Pinus

grey-leaf pine (verb)	pine (verb)
	have a desire for something or someone who is not present