Cash vs Johnny Cash

Cash and Johnny Cash both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cash	Yes	No	No	No
Johnny Cash	Yes	No	No	No

As nouns, Cash and Johnny Cash are synonyms defined as:

Cash and Johnny Cash: United States country music singer and songwriter (1932-2003)

Other synonyms of Cash include John Cash.

Cash (noun)	Johnny Cash (noun)
United States country music singer and songwriter (1932-2003)	United States country music singer and songwriter (1932-2003)