Banff vs Banff National Park

Banff and Banff National Park both are nouns.

Word	Noun	Adjective	Verb	Adverb
Banff	Yes	No	No	No
Banff National Park	Yes	No	No	No

As nouns, Banff and Banff National Park are synonyms defined as:

Banff and Banff National Park: a popular vacation spot in the Canadian Rockies

Banff (noun)	Banff National Park (noun)
a popular vacation spot in the Canadian Rockies	a popular vacation spot in the Canadian Rockies