lowland white fir vs grand fir

lowland white fir and grand fir both are nouns.

Word	Noun	Adjective	Verb	Adverb
lowland white fir	Yes	No	No	No
grand fir	Yes	No	No	No

As nouns, lowland white fir and grand fir are synonyms defined as:

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

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

lowland white fir (noun)	grand 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