sidesplitter vs belly laugh

sidesplitter and belly laugh both are nouns.

Word	Noun	Adjective	Verb	Adverb
sidesplitter	Yes	No	No	No
belly laugh	Yes	No	No	No

As nouns, sidesplitter and belly laugh are synonyms defined as:

Other synonyms of sidesplitter include howler, riot, scream, thigh-slapper, wow.

sidesplitter (noun)	belly laugh (noun)
a joke that seems extremely funny	a joke that seems extremely funny
	a burst of deep loud hearty laughter