Pinus rigida vs pine

Pinus rigida and pine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pinus rigida	Yes	No	No	No
pine	Yes	No	Yes	No

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

Pinus rigida: large three-needled pine of the eastern United States and southeastern Canada; closely related to the pond pine
pine: a coniferous tree

Other hypernyms of Pinus rigida include pine tree, true pine.

Pinus rigida (noun)	pine (noun)
large three-needled pine of the eastern United States and southeastern Canada; closely related to the pond pine	a coniferous tree
	straight-grained durable and often resinous white to yellowish timber of any of numerous trees of the genus Pinus

Pinus rigida (verb)	pine (verb)
	have a desire for something or someone who is not present