loser

nouns

a contestant who loses the contest
also-ran, loser
is derived from
lose
antonym
winner
a person with a record of failing; someone who loses consistently
failure, loser, nonstarter, unsuccessful person
is derived from
lose
antonym
achiever
a gambler who loses a bet
loser
is derived from
lose
is derived from
lose
antonym
winner
is a type of (narrower)
a person who wagers money on the outcome of games or sporting events
gambler