Corylus avellana vs filbert

Corylus avellana and filbert both are nouns.

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

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

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

Other synonyms of Corylus avellana include cobnut, Corylus avellana grandis.

Corylus avellana (noun)	filbert (noun)
small nut-bearing tree much grown in Europe	nut of any of several trees of the genus Corylus
	small nut-bearing tree much grown in Europe