Corylus avellana grandis vs Corylus avellana

Corylus avellana grandis and Corylus avellana both are nouns.

Word	Noun	Adjective	Verb	Adverb
Corylus avellana grandis	Yes	No	No	No
Corylus avellana	Yes	No	No	No

As nouns, Corylus avellana grandis and Corylus avellana are synonyms defined as:

Corylus avellana grandis and Corylus avellana: small nut-bearing tree much grown in Europe

Other synonyms of Corylus avellana grandis include cobnut, filbert.

Corylus avellana grandis (noun)	Corylus avellana (noun)
small nut-bearing tree much grown in Europe	small nut-bearing tree much grown in Europe