bomb vs flop

bomb and flop both are nouns.

Word	Noun	Adjective	Verb	Adverb
bomb	Yes	No	Yes	No
flop	Yes	No	Yes	Yes

As nouns, flop is a hypernym of bomb; that is, flop is a word with a broader meaning than bomb:

Other hypernyms of bomb include bust, fizzle.

bomb (noun)	flop (noun)
an explosive device fused to explode under specific conditions	the act of throwing yourself down; collapse; sink
strong sealed vessel for measuring heat of combustion	a complete failure
an event that fails badly or is totally ineffectual	someone who is unsuccessful
	an arithmetic operation performed on floating-point numbers

bomb (verb)	flop (verb)
throw bombs at or attack with bombs	fall suddenly and abruptly
fail to get a passing grade	fall loosely
	fail utterly; collapse

bomb (adverb)	flop (adverb)
	with a flopping sound
	completely