grand fir vs giant fir

grand fir and giant fir both are nouns.

Word	Noun	Adjective	Verb	Adverb
grand fir	Yes	No	No	No
giant fir	Yes	No	No	No

As nouns, grand fir and giant fir are synonyms defined as:

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

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

grand fir (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