Cambodian vs Asian

Cambodian and Asian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cambodian	Yes	Yes	No	No
Asian	Yes	Yes	No	No

As nouns, Asian is a hypernym of Cambodian; that is, Asian is a word with a broader meaning than Cambodian:

Other hypernyms of Cambodian include Asiatic.

Cambodian (noun)	Asian (noun)
a native or inhabitant of Cambodia	a native or inhabitant of Asia

Cambodian (adjective)	Asian (adjective)
of or relating to or characteristic of Cambodia or its people or language	of or relating to or characteristic of Asia or the peoples of Asia or their languages or culture