ויכוח

Etymology
Action noun of the verb, from the root.

Noun

 * 1) An argument, a verbal dispute, a quarrel: an exchange of words between parties who disagree about something.
 * אין ויכוח כי — éin vikúakh kí  — There is no dispute that or No one disputes that

Usage notes

 * In current usage, the noun is much more common than the verb  from which it derives. The more common verb is ; indeed, etymological considerations aside,  may perhaps be thought of as an action noun for the latter. (A regularly formed action noun  does exist, but is much less common.)