1. Protuberance; convexity.

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

• fibbousness,
• vibbousness,
• bibbousness,
• hibbousness,
• yibbousness,
• tibbousness,
• gubbousness,
• gjbbousness,
• gkbbousness,
• gobbousness,
• g9bbousness,
• g8bbousness,
• givbousness,
• ginbousness,
• gihbousness,
• gibbousnesse,
• gibbousnes,
• Gibsouness,
• Gibsosness,
• Gibusness

• joyousness,
• Jealousness.

The adjective form of the word "gibbousness" is "gibbous".

The plural of the "gibbousness" can be the "gibbousnesses".

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