composer vs George Gershwin

composer and George Gershwin both are nouns.

Word	Noun	Adjective	Verb	Adverb
composer	Yes	No	No	No
George Gershwin	Yes	No	No	No

composer (noun)	George Gershwin (noun)
someone who composes music, usually as a profession	United States composer who incorporated jazz into classical forms and composed scores for musical comedies (1898-1937)