Newfoundland and Labrador vs Saint John's

Newfoundland and Labrador and Saint John's both are nouns.

Word	Noun	Adjective	Verb	Adverb
Newfoundland and Labrador	Yes	No	No	No
Saint John's	Yes	No	No	No

Newfoundland and Labrador (noun)	Saint John's (noun)
a Canadian province on the island of Newfoundland and on the mainland along the coast of the Labrador Sea; became Canada's 10th province in 1949	a port and provincial capital of Newfoundland
	the capital and largest city of Antigua and Barbuda; located on the island of Antigua