Austronesian vs inhabitant

Austronesian and inhabitant both are nouns.

Word	Noun	Adjective	Verb	Adverb
Austronesian	Yes	Yes	No	No
inhabitant	Yes	No	No	No

As nouns, inhabitant is a hypernym of Austronesian; that is, inhabitant is a word with a broader meaning than Austronesian:

Other hypernyms of Austronesian include denizen, dweller, habitant, indweller.

Austronesian (noun)	inhabitant (noun)
the family of languages spoken in Australia and Formosa and Malaysia and Polynesia	a person who inhabits a particular place
a native or inhabitant of Austronesia

Austronesian (adjective)	inhabitant (adjective)
of or relating to or characteristic of Austronesia or its people or culture