1. One who keeps a diary.

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

• tearist,
• deariest,
• diagost,
• arist,
• diefist,
• diguist,
• firist,
• dearst,
• disrest,
• dianost,
• daist,
• discist,
• disist,
• daoist,
• nearist,
• damist,
• darkist,
• diaried,
• diarised,
• dearist

• direct,
• Diaries,
• directing,
• directly,
• direction,
• directive,
• director,
• direst,
• directed,
• directory,
• dearest,
• Driest.

The adjective form of the word "diarist" is "diaristic".

The plural of the "diarist" can be the "diarists".

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