wow vs belly laugh

wow and belly laugh both are nouns.

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

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

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

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

wow (verb)	belly laugh (verb)
impress greatly