loser vs flop

loser and flop both are nouns.

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

As nouns, flop is a hyponym of loser; that is, flop is a word with a more specific, narrower meaning than loser:

Other hyponyms of loser include bankrupt, insolvent, flash in the pan, dud, washout, underdog.

loser (noun)	flop (noun)
a gambler who loses a bet	the act of throwing yourself down; collapse; sink
a contestant who loses the contest	a complete failure
a person with a record of failing; someone who loses consistently	someone who is unsuccessful
	an arithmetic operation performed on floating-point numbers

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