1. The act or operation of taking a part from the rest; the taking of a lesser number or quantity from a greater.

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

• substractions,
• substruction,
• subtratcion,
• subratction,
• sustraction,
• subtractio,
• subraction,
• subtration,
• subtracation,
• subrtraction,
• subtractin,
• abtraction,
• subtaction,
• subtractoin,
• subtracrion,
• subtratction,
• sutraction,
• subtracion,
• substraction,
• subtrataction

• subtract,
• subtropic,
• subtracted,
• subtractive,
• subtrahend,
• subtracter.

The adjective form of the word "subtraction" is "subtractive".

The plural of the "subtraction" can be the "subtractions".

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