fir vs bristlecone fir

fir and bristlecone fir both are nouns.

Word	Noun	Adjective	Verb	Adverb
fir	Yes	No	No	No
bristlecone fir	Yes	No	No	No

As nouns, bristlecone fir is a hyponym of fir; that is, bristlecone fir is a word with a more specific, narrower meaning than fir:

fir: any of various evergreen trees of the genus Abies; chiefly of upland areas
bristlecone fir: a pyramidal fir of southwestern California having spiny pointed leaves and cone scales with long spines

Other hyponyms of fir include silver fir, Abies bracteata, Abies venusta, Santa Lucia fir.

fir (noun)	bristlecone fir (noun)
any of various evergreen trees of the genus Abies; chiefly of upland areas	a pyramidal fir of southwestern California having spiny pointed leaves and cone scales with long spines
nonresinous wood of a fir tree