• guiless,
• atless,
• cutless,
• guttless,
• guidess,
• gurtles,
• cuntless,
• cupless,
• outles,
• hurtless,
• coutless,
• fuitless,
• gitness,
• guters,
• guttes,
• dutless,
• gatless,
• gamless,
• guitless,
• gutlese

• cutlass.

The adjective form of the word "gutless" is "gutless" itself.

The plural form of the word "gutless" is "gutlesses." However, it is not commonly used in the plural form, and the singular form is more commonly used to describe individuals who lack courage or determination.

The singular form of the word "gutless" is "gutless". The word does not change in its singular form.