1. One who asks questions; an inquirer.

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

• questionig,
• questionof,
• questionnes,
• questionier,
• questionare,
• questionars,
• qurestionner,
• qestioned,
• questionor,
• questionar,
• questiond,
• questionas,
• questine,
• questionnere,
• questionsor,
• qustioned,
• questiong,
• questioed,
• questionss,
• questionon

• questionably,
• question mark,
• questioning,
• question time,
• question,
• questioningly,
• questionnaire,
• questionable.

The adjective form of the word "questioner" is "questioning".

The plural of the "questioner" can be the "questioners".

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