composer vs Lord Britten of Aldeburgh

composer and Lord Britten of Aldeburgh both are nouns.

Word	Noun	Adjective	Verb	Adverb
composer	Yes	No	No	No
Lord Britten of Aldeburgh	Yes	No	No	No

composer (noun)	Lord Britten of Aldeburgh (noun)
someone who composes music, usually as a profession	major English composer of the 20th century; noted for his operas (1913-1976)