Banff National Park vs Banff

Banff National Park and Banff both are nouns.

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

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

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

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