Agathis australis vs kauri pine

Agathis australis and kauri pine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Agathis australis	Yes	No	No	No
kauri pine	Yes	No	No	No

As nouns, kauri pine is a hypernym of Agathis australis; that is, kauri pine is a word with a broader meaning than Agathis australis:

Agathis australis: tall timber tree of New Zealand having white straight-grained wood
kauri pine: any of various trees of the genus Agathis; yield dammar resin

Other hypernyms of Agathis australis include dammar pine.

Agathis australis (noun)	kauri pine (noun)
tall timber tree of New Zealand having white straight-grained wood	any of various trees of the genus Agathis; yield dammar resin