Nyiragongo vs Mount Nyiragongo

Nyiragongo and Mount Nyiragongo both are nouns.

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

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

Nyiragongo and Mount Nyiragongo: an active volcano in eastern Congo, at times with the most voluminous lava lake known in recent history

Nyiragongo (noun)	Mount Nyiragongo (noun)
an active volcano in eastern Congo, at times with the most voluminous lava lake known in recent history	an active volcano in eastern Congo, at times with the most voluminous lava lake known in recent history