Synonyms for challenger

I say, Rector, did you really know a Challenger in the 'nineties?

"Thou wert the challenger, O Marzak," his father reminded him.

There and then Locasto seemed about to spring on his challenger.

The challenger used a fierce Italian oath, and by it he knew that it was Pietro.

Well, gentlemen, I am not the challenger; the challenge comes from you.

Dan's teeth snapped closed, then parted to grin at his challenger.

Then, with a mighty bellow he strode slowly toward his challenger.

Anneslie, the knight, was the complainant and the challenger.

His intended antagonist was the first to demand the card, and must needs be challenger.

No use to think about duelling now, whoever might be challenger.