break dance vs dance

break dance and dance both are nouns.

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

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

break dance: a form of solo dancing that involves rapid acrobatic moves in which different parts of the body touch the ground; normally performed to the rhythm of rap music
dance: taking a series of rhythmical steps (and movements) in time to music

Other hypernyms of break dance include dancing, saltation, terpsichore.

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

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

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

break dance (noun)	dance (noun)
a form of solo dancing that involves rapid acrobatic moves in which different parts of the body touch the ground; normally performed to the rhythm of rap music	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

break dance (verb)	dance (verb)
do a break dance	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