hula-hula vs Hawaiian dancing

hula-hula and Hawaiian dancing both are nouns.

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

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

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

Other synonyms of hula-hula include hula.

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