square dance vs contradance

square dance and contradance both are nouns.

Word	Noun	Adjective	Verb	Adverb
square dance	Yes	No	Yes	No
contradance	Yes	No	Yes	No

As nouns, contradance is a hypernym of square dance; that is, contradance is a word with a broader meaning than square dance:

square dance: American country dancing in which couples form squares
contradance: a type of folk dance in which couples are arranged in sets or face one another in a line

Other hypernyms of square dance include contra danse, contredanse, country-dance, country dancing.

square dance (noun)	contradance (noun)
American country dancing in which couples form squares	a type of folk dance in which couples are arranged in sets or face one another in a line

square dance (verb)	contradance (verb)
dance in formation	perform a contradance