fir vs coniferous tree

fir and coniferous tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
fir	Yes	No	No	No
coniferous tree	Yes	No	No	No

As nouns, coniferous tree is a hypernym of fir; that is, coniferous tree is a word with a broader meaning than fir:

fir: any of various evergreen trees of the genus Abies; chiefly of upland areas
coniferous tree: any gymnospermous tree or shrub bearing cones

Other hypernyms of fir include conifer.

fir (noun)	coniferous tree (noun)
any of various evergreen trees of the genus Abies; chiefly of upland areas	any gymnospermous tree or shrub bearing cones
nonresinous wood of a fir tree