copper beech vs Fagus sylvatica purpurea

copper beech and Fagus sylvatica purpurea both are nouns.

Word	Noun	Adjective	Verb	Adverb
copper beech	Yes	No	No	No
Fagus sylvatica purpurea	Yes	No	No	No

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

copper beech and Fagus sylvatica purpurea: variety of European beech with shining purple or copper-colored leaves

Other synonyms of copper beech include Fagus purpurea, Fagus sylvatica atropunicea, purple beech.

copper beech (noun)	Fagus sylvatica purpurea (noun)
variety of European beech with shining purple or copper-colored leaves	variety of European beech with shining purple or copper-colored leaves