1. Clerical.

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

• clerial,
• cleick,
• clnic,
• cleran,
• alleric,
• clasic,
• clery,
• calerie,
• ecletric,
• clerer,
• clerify,
• clorin,
• clearics,
• clerge,
• clerck,
• clera,
• claoric,
• geeric,
• cliic,
• clerar

• clerking,
• clark,
• Clarice,
• clerical,
• clerisy,
• Claris,
• clorox,
• clarkin,
• celeriac,
• clergy,
• choleric,
• clerk,
• Clarke,
• lyric,
• clowers.

The adjective form of the word "cleric" is "clerical".

The plural of the "cleric" can be the "clerics".

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