larch tree vs coniferous tree

larch tree and coniferous tree both are nouns.

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

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

larch tree: any of numerous conifers of the genus Larix all having deciduous needlelike leaves
coniferous tree: any gymnospermous tree or shrub bearing cones

Other hypernyms of larch tree include conifer.

larch tree (noun)	coniferous tree (noun)
any of numerous conifers of the genus Larix all having deciduous needlelike leaves	any gymnospermous tree or shrub bearing cones