contester

transitive verb

1. to try to disprove or invalidate (something) as by argument or legal action; dispute: to contest a will
2. to fight for (ground, a military position, etc.); struggle to win or keep

Origin: Fr contester < L contestari, to call to witness, bring action < com-, together + testari, to bear witness < testis, a witness: see testify

intransitive verb

noun

1. a fight, struggle, conflict, or controversy
2. any race, game, debate, etc. in which individuals or teams compete with one another to determine the winner