Abies alba vs silver fir

Abies alba and silver fir both are nouns.

Word	Noun	Adjective	Verb	Adverb
Abies alba	Yes	No	No	No
silver fir	Yes	No	No	No

As nouns, silver fir is a hypernym of Abies alba; that is, silver fir is a word with a broader meaning than Abies alba:

Abies alba: tall timber tree of central and southern Europe having a regular crown and grey bark
silver fir: any of various true firs having leaves white or silvery white beneath

Abies alba (noun)	silver fir (noun)
tall timber tree of central and southern Europe having a regular crown and grey bark	any of various true firs having leaves white or silvery white beneath