Break dancing and Break-dance

Break dancing 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.

Break-dance is a synonym for break dancing. In some cases you can use "Break-dance" instead a verb phrase "Break dancing".

Break-dance verb - Do a break dance.

Break dancing is a synonym for break-dance. You can use "Break dancing" instead a noun phrase "Break-dance".