Larix occidentalis vs western tamarack

Larix occidentalis and western tamarack both are nouns.

Word	Noun	Adjective	Verb	Adverb
Larix occidentalis	Yes	No	No	No
western tamarack	Yes	No	No	No

As nouns, Larix occidentalis and western tamarack are synonyms defined as:

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

Other synonyms of Larix occidentalis include Oregon larch, western larch.

Larix occidentalis (noun)	western tamarack (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