Fagus americana vs American beech

Fagus americana and American beech both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fagus americana	Yes	No	No	No
American beech	Yes	No	No	No

As nouns, Fagus americana and American beech are synonyms defined as:

Fagus americana and American beech: North American forest tree with light green leaves and edible nuts

Other synonyms of Fagus americana include Fagus grandifolia, red beech, white beech.

Fagus americana (noun)	American beech (noun)
North American forest tree with light green leaves and edible nuts	North American forest tree with light green leaves and edible nuts