lowland white fir vs giant fir

lowland white fir and giant fir both are nouns.

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

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

lowland white fir and giant 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, grand fir, lowland fir.

lowland white 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