copper beech vs Fagus purpurea

copper beech and Fagus purpurea both are nouns.

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

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

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

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

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