American larch vs black larch

American larch and black larch both are nouns.

Word	Noun	Adjective	Verb	Adverb
American larch	Yes	No	No	No
black larch	Yes	No	No	No

As nouns, American larch and black larch are synonyms defined as:

American larch and black larch: 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 Larix laricina, tamarack.

American larch (noun)	black larch (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