giant fir vs lowland white fir

giant fir and lowland white fir both are nouns.

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

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

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

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

giant fir (noun)	lowland white 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