1. A repetition of the same meaning in different words.

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

• catology,
• patology,
• pahtology,
• aetology,
• tautologic,
• rautology,
• fautology,
• tautoligy,
• tutology,
• tatology,
• tautoogy,
• tautolgy,
• tautolgoy,
• thaantology,
• battologyy,
• cattology,
• iamtology,
• nastology,
• mastolgy,
• pantolgoy

• tautologic,
• tautological.

The adjective form of the word "tautology" is "tautological".

The plural of the "tautology" can be the "tautologies".

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