Abies balsamea vs silver fir

Abies balsamea and silver fir both are nouns.

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

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

Abies balsamea: medium-sized fir of northeastern North America; leaves smell of balsam when crushed; much used for pulpwood and Christmas trees
silver fir: any of various true firs having leaves white or silvery white beneath

Abies balsamea (noun)	silver fir (noun)
medium-sized fir of northeastern North America; leaves smell of balsam when crushed; much used for pulpwood and Christmas trees	any of various true firs having leaves white or silvery white beneath