Choose the perfect synonym or antonym for the word

Runner

/ˈrʌnə/

A person who runs, often for sport or exercise, or a machine that moves quickly along a track.

Synonyms:

I'll have one of the runners bring it to you.

He's a fast runner and competes in marathons.

She was a key runner in getting the project approved.

Middle English, from the verb runnen, of Germanic origin; related to Dutch runnen and German rennen.

15 mentions per 1 million words

Moderate

Hint: Frequency according to COCA