red pine vs coniferous tree

red pine and coniferous tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
red pine	Yes	No	No	No
coniferous tree	Yes	No	No	No

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

Other hypernyms of red pine include conifer.

red pine (noun)	coniferous tree (noun)
pine of eastern North America having long needles in bunches of two and reddish bark	any gymnospermous tree or shrub bearing cones
tall New Zealand timber tree