araucaria vs coniferous tree

araucaria and coniferous tree both are nouns.

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

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

araucaria: any of several tall South American or Australian trees with large cones and edible seeds
coniferous tree: any gymnospermous tree or shrub bearing cones

Other hypernyms of araucaria include conifer.

araucaria (noun)	coniferous tree (noun)
any of several tall South American or Australian trees with large cones and edible seeds	any gymnospermous tree or shrub bearing cones