composer vs Francois Couperin

composer and Francois Couperin both are nouns.

Word	Noun	Adjective	Verb	Adverb
composer	Yes	No	No	No
Francois Couperin	Yes	No	No	No

composer (noun)	Francois Couperin (noun)
someone who composes music, usually as a profession	French composer of music for organ and a member of a family of distinguished organists (1668-1733)