giant fir vs lowland fir

giant fir and lowland fir both are nouns.

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

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

giant fir and lowland 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 white fir.

giant fir (noun)	lowland 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