hard beech vs Nothofagus truncata

hard beech and Nothofagus truncata both are nouns.

Word	Noun	Adjective	Verb	Adverb
hard beech	Yes	No	No	No
Nothofagus truncata	Yes	No	No	No

As nouns, hard beech and Nothofagus truncata are synonyms defined as:

hard beech and Nothofagus truncata: tall New Zealand tree yielding very hard wood

hard beech (noun)	Nothofagus truncata (noun)
tall New Zealand tree yielding very hard wood	tall New Zealand tree yielding very hard wood