1. The quality of being solid; solidity; soundness.

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

• politness,
• siliness,
• saidness,
• soudness,
• solidgers,
• horidness,
• aolidness,
• zolidness,
• xolidness,
• soludness,
• solodness,
• sollidness,
• solidnesss,
• solidnesse,
• solidnes,
• soliddness,
• sooitness,
• souldness,
• polishdness,
• setledness

• solid angle,
• soliton,
• soldner.

The adjective form of the word "solidness" is "solid".

The plural of the "solidness" can be the "solidnesses".

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