composer vs Sergei Vasilievich Rachmaninoff

composer and Sergei Vasilievich Rachmaninoff both are nouns.

Word	Noun	Adjective	Verb	Adverb
composer	Yes	No	No	No
Sergei Vasilievich Rachmaninoff	Yes	No	No	No

composer (noun)	Sergei Vasilievich Rachmaninoff (noun)
someone who composes music, usually as a profession	composer and piano virtuoso born in Russia (1873-1943)