Abies grandis vs giant fir

Abies grandis and giant fir both are nouns.

Word	Noun	Adjective	Verb	Adverb
Abies grandis	Yes	No	No	No
giant fir	Yes	No	No	No

As nouns, Abies grandis and giant fir are synonyms defined as:

Abies grandis and giant fir: lofty fir of the Pacific coast of northwestern America having long curving branches and deep green leaves

Other synonyms of Abies grandis include grand fir, lowland fir, lowland white fir.

Abies grandis (noun)	giant fir (noun)
lofty fir of the Pacific coast of northwestern America having long curving branches and deep green leaves	lofty fir of the Pacific coast of northwestern America having long curving branches and deep green leaves