American larch vs Larix laricina

American larch and Larix laricina both are nouns.

Word	Noun	Adjective	Verb	Adverb
American larch	Yes	No	No	No
Larix laricina	Yes	No	No	No

As nouns, American larch and Larix laricina are synonyms defined as:

American larch and Larix laricina: medium-sized larch of Canada and northern United States including Alaska having a broad conic crown and rust-brown scaly bark

Other synonyms of American larch include black larch, tamarack.

American larch (noun)	Larix laricina (noun)
medium-sized larch of Canada and northern United States including Alaska having a broad conic crown and rust-brown scaly bark	medium-sized larch of Canada and northern United States including Alaska having a broad conic crown and rust-brown scaly bark