Jack Benny vs Benny

Jack Benny and Benny both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jack Benny	Yes	No	No	No
Benny	Yes	No	No	No

As nouns, Jack Benny and Benny are synonyms defined as:

Jack Benny and Benny: United States comedian known for his timeing and delivery and self-effacing humor (1894-1974)

Other synonyms of Jack Benny include Benjamin Kubelsky.

Jack Benny (noun)	Benny (noun)
United States comedian known for his timeing and delivery and self-effacing humor (1894-1974)	United States comedian known for his timeing and delivery and self-effacing humor (1894-1974)