winner vs walloper

winner and walloper both are nouns.

Word	Noun	Adjective	Verb	Adverb
winner	Yes	No	No	No
walloper	Yes	No	No	No

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

Other hyponyms of winner include contestee, medalist, medallist, upsetter.

winner (noun)	walloper (noun)
the contestant who wins the contest	a gross untruth; a blatant lie
a gambler who wins a bet	a winner by a wide margin
a person with a record of successes	a very hard hitter