Denali vs McKinley

Denali and McKinley both are nouns.

Word	Noun	Adjective	Verb	Adverb
Denali	Yes	No	No	No
McKinley	Yes	No	No	No

As nouns, Denali and McKinley are synonyms defined as:

Denali and McKinley: a mountain in south central Alaska; the highest peak in North America (20,300 feet high)

Other synonyms of Denali include Mount McKinley, Mt. McKinley.

Denali (noun)	McKinley (noun)
a mountain in south central Alaska; the highest peak in North America (20,300 feet high)	a mountain in south central Alaska; the highest peak in North America (20,300 feet high)
	25th President of the United States; was assassinated by an anarchist (1843-1901)