Papua New Guinea vs Port Moresby

Papua New Guinea and Port Moresby both are nouns.

Word	Noun	Adjective	Verb	Adverb
Papua New Guinea	Yes	No	No	No
Port Moresby	Yes	No	No	No

Papua New Guinea (noun)	Port Moresby (noun)
a parliamentary democracy on the eastern half of the island of New Guinea; in 1975 it became an independent state within the Commonwealth of Nations	the administrative capital and largest city of Papua New Guinea