composer vs Moussorgsky

composer and Moussorgsky both are nouns.

Word	Noun	Adjective	Verb	Adverb
composer	Yes	No	No	No
Moussorgsky	Yes	No	No	No

composer (noun)	Moussorgsky (noun)
someone who composes music, usually as a profession	Russian composer of operas and orchestral works (1839-1881)