Berlin vs Irving Berlin

Berlin and Irving Berlin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Berlin	Yes	No	No	No
Irving Berlin	Yes	No	No	No

As nouns, Berlin and Irving Berlin are synonyms defined as:

Berlin and Irving Berlin: United States songwriter (born in Russia) who wrote more than 1500 songs and several musical comedies (1888-1989)

Other synonyms of Berlin include Israel Baline.

Berlin (noun)	Irving Berlin (noun)
capital of Germany located in eastern Germany	United States songwriter (born in Russia) who wrote more than 1500 songs and several musical comedies (1888-1989)
United States songwriter (born in Russia) who wrote more than 1500 songs and several musical comedies (1888-1989)