Olympus vs Mt. Olympus

Olympus and Mt. Olympus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Olympus	Yes	No	No	No
Mt. Olympus	Yes	No	No	No

As nouns, Olympus and Mt. Olympus are synonyms defined as:

Olympus and Mt. Olympus: a mountain peak in northeast Greece near the Aegean coast; believed by ancient Greeks to be the dwelling place of the gods (9,570 feet high)

Other synonyms of Olympus include Mount Olympus, Olimbos.

Olympus (noun)	Mt. Olympus (noun)
a mountain peak in northeast Greece near the Aegean coast; believed by ancient Greeks to be the dwelling place of the gods (9,570 feet high)	a mountain peak in northeast Greece near the Aegean coast; believed by ancient Greeks to be the dwelling place of the gods (9,570 feet high)