Whitney vs Mount Whitney

Whitney and Mount Whitney both are nouns.

Word	Noun	Adjective	Verb	Adverb
Whitney	Yes	No	No	No
Mount Whitney	Yes	No	No	No

As nouns, Whitney and Mount Whitney are synonyms defined as:

Whitney and Mount Whitney: the highest peak in the Sierra Nevada range in California (14,494 feet high)

Whitney (noun)	Mount Whitney (noun)
the highest peak in the Sierra Nevada range in California (14,494 feet high)	the highest peak in the Sierra Nevada range in California (14,494 feet high)
United States inventor of the mechanical cotton gin (1765-1825)