1. Without base or foundation.

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

• biseness,
• baseses,
• bassess,
• balless,
• bagless,
• basees,
• basless,
• usseless,
• baseles,
• bacelets,
• beless,
• bassless,
• baselees,
• baesless,
• baselless,
• faseless,
• glaseless,
• wakelesss,
• bashlesss,
• bashleses

• backless,
• basileus.

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

The plural form of the word "baseless" is "baselesses".

The singular form of the word "baseless" is "base"