cha-cha-cha vs ballroom dance

cha-cha-cha and ballroom dance both are nouns.

Word	Noun	Adjective	Verb	Adverb
cha-cha-cha	Yes	No	No	No
ballroom dance	Yes	No	No	No

As nouns, ballroom dance is a hypernym of cha-cha-cha; that is, ballroom dance is a word with a broader meaning than cha-cha-cha:

cha-cha-cha: a modern ballroom dance from Latin America; small steps and swaying movements of the hips
ballroom dance: any of a variety of social dances performed by couples in a ballroom

Other hypernyms of cha-cha-cha include ballroom dancing.

cha-cha-cha (noun)	ballroom dance (noun)
a modern ballroom dance from Latin America; small steps and swaying movements of the hips	any of a variety of social dances performed by couples in a ballroom