Chilean rimu vs shrub

Chilean rimu and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chilean rimu	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of Chilean rimu; that is, shrub is a word with a broader meaning than Chilean rimu:

Chilean rimu: about the hardiest Podocarpaceae species; prostrate spreading shrub similar to mountain rimu; mountains of southern Chile
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Chilean rimu include bush.

Chilean rimu (noun)	shrub (noun)
about the hardiest Podocarpaceae species; prostrate spreading shrub similar to mountain rimu; mountains of southern Chile	a low woody perennial plant usually having several major stems