belly whopper vs belly flop

belly whopper and belly flop both are nouns.

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

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

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

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

belly whopper (noun)	belly flop (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