Fagus sylvatica purpurea vs copper beech

Fagus sylvatica purpurea and copper beech both are nouns.

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

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

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

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

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