Papuan vs New Guinea

Papuan and New Guinea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Papuan	Yes	Yes	No	No
New Guinea	Yes	No	No	No

Papuan (noun)	New Guinea (noun)
any of the indigenous languages spoken in Papua New Guinea or New Britain or the Solomon Islands that are not Malayo-Polynesian languages	a Pacific island to the north of Australia; the 2nd largest island in the world; the western part is governed by Indonesia and the eastern part is Papua New Guinea
a native or inhabitant of Papua New Guinea or New Guinea

Papuan (adjective)	New Guinea (adjective)
of or relating to Papua or its people or language