common beech vs Fagus sylvatica

common beech and Fagus sylvatica both are nouns.

Word	Noun	Adjective	Verb	Adverb
common beech	Yes	No	No	No
Fagus sylvatica	Yes	No	No	No

As nouns, common beech and Fagus sylvatica are synonyms defined as:

common beech and Fagus sylvatica: large European beech with minutely-toothed leaves; widely planted as an ornamental in North America

Other synonyms of common beech include European beech.

common beech (noun)	Fagus sylvatica (noun)
large European beech with minutely-toothed leaves; widely planted as an ornamental in North America	large European beech with minutely-toothed leaves; widely planted as an ornamental in North America