1. Command; precept; a law, especially of the decalogue.

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

• commendmend,
• comandment,
• comminment,
• commatment,
• commendment,
• commintment,
• commendments,
• commencment,
• commadament,
• commanment,
• commandements,
• cammandments,
• commandmends,
• commmandment,
• commandmants,
• comandments,
• commandents,
• commandemnt,
• commandent,
• ommandments

• command post,
• commandant,
• comandra,
• commander,
• commandership,
• Conan Doyle,
• commandery,
• common time,
• comminate,
• common meter,
• commando,
• command module,
• commanding,
• commandeer,
• comminute,
• command prompt,
• command line,
• command key.

The adjective form of the word "commandment" is "commandmentary". However, it is not a commonly used adjective.

The plural of the "commandment" can be the "commandments".

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