WordNet: challenger, competition, competitor, contender, rival

the contestant you hope to defeat; "he had respect for his rivals"; "he wanted to know what the competition was doing"

• hypernym contestant

• hyponym champ, champion, title-holder

• hyponym comer

• hyponym finalist

• hyponym enemy, foe

• hyponym favorite, favourite, front-runner

• hyponym king, queen, world-beater

• hyponym runner-up, second best

• hyponym scratch

• hyponym semifinalist

• hyponym street fighter

• hyponym tier

• hyponym tilter

challenger

• (englanti) challenge (derivationally related)
• (suomi) haastaja (synonyymi)

competition

• (suomi) kilpailija (synonyymi)

competitor

• (englanti) compete (derivationally related)
• (suomi) kilpailija (synonyymi)

contender

• (englanti) contend (derivationally related)
• (suomi) kilpailija (synonyymi)

rival

• (englanti) rival (derivationally related)

• (englanti) rivalrous (derivationally related)
• (suomi) kilpailija (synonyymi)