belly whopper vs belly flopper

belly whopper and belly flopper both are nouns.

Word	Noun	Adjective	Verb	Adverb
belly whopper	Yes	No	No	No
belly flopper	Yes	No	No	No

As nouns, belly whopper and belly flopper are synonyms defined as:

belly whopper and belly flopper: a dive in which the abdomen bears the main force of impact with the water

Other synonyms of belly whopper include belly flop, belly whop.

belly whopper (noun)	belly flopper (noun)
a dive in which the abdomen bears the main force of impact with the water	a dive in which the abdomen bears the main force of impact with the water