Hawaiian dancing vs hula-hula

Hawaiian dancing and hula-hula both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hawaiian dancing	Yes	No	No	No
hula-hula	Yes	No	No	No

As nouns, Hawaiian dancing and hula-hula are synonyms defined as:

Hawaiian dancing and hula-hula: a Polynesian rain dance performed by a woman

Other synonyms of Hawaiian dancing include hula.

Hawaiian dancing (noun)	hula-hula (noun)
a Polynesian rain dance performed by a woman	a Polynesian rain dance performed by a woman