square dance vs dance

square dance and dance both are nouns.

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

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

square dance: dance in formation
dance: move in a pattern; usually to musical accompaniment; do or perform a dance

Other hypernyms of square dance include trip the light fantastic, trip the light fantastic toe.

square dance (noun)	dance (noun)
American country dancing in which couples form squares	taking a series of rhythmical steps (and movements) in time to music
	an artistic form of nonverbal communication
	a party for social dancing
	a party of people assembled for dancing

square dance (verb)	dance (verb)
dance in formation	move in a pattern; usually to musical accompaniment; do or perform a dance
	move in a graceful and rhythmical way
	skip, leap, or move up and down or sideways