1. Having no smoke.

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

• smokless,
• smokeyness,
• smokelss,
• smokyness,
• amokeless,
• zmokeless,
• xmokeless,
• dmokeless,
• emokeless,
• wmokeless,
• snokeless,
• skokeless,
• sjokeless,
• smikeless,
• smokelesse,
• smokeles,
• makelesse,
• sokless,
• smokles,
• Smokjumps

• smoke hole,
• smoke alarm.

The adjective form of the word "smokeless" is "smokeless".

The plural form of "smokeless" is "smokelesses".

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