1. An expositor.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• communcator,
• commentor,
• commentaters,
• comentator,
• commentter,
• competator,
• commontators,
• comentators,
• commetator,
• commenttators,
• commentatory,
• commentater,
• commontator,
• commontater,
• comintator,
• compettator,
• commintator,
• commentaors,
• commenators,
• cometator

• common teasel,
• comminute,
• comminatory,
• commentate,
• community,
• commendation,
• comandra,
• commentary,
• comminate,
• commandant,
• commando,
• come into.

The adjective form of the word "commentator" is "commentatorial".

The plural of the "commentator" can be the "commentators".

The singular of the "commentator" can be the "commentator".