1. One who giggles or titters.

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

• gigle,
• gigner,
• gigglin,
• gigglely,
• girger,
• gigled,
• jiggley,
• gingle,
• giggley,
• giggeled,
• gigles,
• giggies,
• giger,
• piggle,
• giggleed,
• gigiled,
• giigled,
• giiggles,
• gigglet,
• giggleer

• giesler,
• Giessler,
• gisler.

The adjective form of the word "giggler" would be "giggly".

The plural of the "giggler" can be the "gigglers".

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