Nageia nagi vs coniferous tree

Nageia nagi and coniferous tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nageia nagi	Yes	No	No	No
coniferous tree	Yes	No	No	No

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

Nageia nagi: medium-sized tree having glossy lanceolate leaves; southern China to Taiwan and southern Japan
coniferous tree: any gymnospermous tree or shrub bearing cones

Other hypernyms of Nageia nagi include conifer.

Nageia nagi (noun)	coniferous tree (noun)
medium-sized tree having glossy lanceolate leaves; southern China to Taiwan and southern Japan	any gymnospermous tree or shrub bearing cones