concert dance vs ballet

concert dance and ballet both are nouns.

Word	Noun	Adjective	Verb	Adverb
concert dance	Yes	No	No	No
ballet	Yes	No	No	No

As nouns, concert dance and ballet are synonyms defined as:

concert dance and ballet: a theatrical representation of a story that is performed to music by trained dancers

concert dance (noun)	ballet (noun)
a theatrical representation of a story that is performed to music by trained dancers	a theatrical representation of a story that is performed to music by trained dancers
	music written for a ballet