Shasta vs Mount Shasta

Shasta and Mount Shasta both are nouns.

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

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

Shasta and Mount Shasta: a volcanic mountain peak in the Cascade Range in northern California (14,162 feet high)

Shasta (noun)	Mount Shasta (noun)
the Shastan language spoken by the Shasta	a volcanic mountain peak in the Cascade Range in northern California (14,162 feet high)
a volcanic mountain peak in the Cascade Range in northern California (14,162 feet high)
a member of the Indian people of northern California and southern Oregon