slam dance vs slam dancing

slam dance and slam dancing both are nouns.

Word	Noun	Adjective	Verb	Adverb
slam dance	Yes	No	Yes	No
slam dancing	Yes	No	No	No

As nouns, slam dance and slam dancing are synonyms defined as:

slam dance and slam dancing: a form of dancing in which dancers slam into one another; normally performed to punk rock

slam dance (noun)	slam dancing (noun)
a form of dancing in which dancers slam into one another; normally performed to punk rock	a form of dancing in which dancers slam into one another; normally performed to punk rock

slam dance (verb)	slam dancing (verb)
dance the slam dance