Oregon larch vs Larix occidentalis

Oregon larch and Larix occidentalis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oregon larch	Yes	No	No	No
Larix occidentalis	Yes	No	No	No

As nouns, Oregon larch and Larix occidentalis are synonyms defined as:

Oregon larch and Larix occidentalis: tall larch of western North America have pale green sharply pointed leaves and oblong cones; an important timber tree

Other synonyms of Oregon larch include western larch, western tamarack.

Oregon larch (noun)	Larix occidentalis (noun)
tall larch of western North America have pale green sharply pointed leaves and oblong cones; an important timber tree	tall larch of western North America have pale green sharply pointed leaves and oblong cones; an important timber tree