Carl Czerny vs Karl Czerny

Carl Czerny and Karl Czerny both are nouns.

Word	Noun	Adjective	Verb	Adverb
Carl Czerny	Yes	No	No	No
Karl Czerny	Yes	No	No	No

As nouns, Carl Czerny and Karl Czerny are synonyms defined as:

Carl Czerny and Karl Czerny: Austrian virtuoso pianist and composer of many works for the piano; studied with Beethoven and was a teacher of Liszt (1791-1857)

Other synonyms of Carl Czerny include Czerny.

Carl Czerny (noun)	Karl Czerny (noun)
Austrian virtuoso pianist and composer of many works for the piano; studied with Beethoven and was a teacher of Liszt (1791-1857)	Austrian virtuoso pianist and composer of many works for the piano; studied with Beethoven and was a teacher of Liszt (1791-1857)