Qualm and Scruples

Qualm noun - An uneasy feeling about the rightness of what one is doing or going to do.

Scruples is a synonym for qualm. In some cases you can use "Scruples" instead a noun "Qualm".

Scruples noun - Motivation deriving logically from ethical or moral principles that govern a person's thoughts and actions.

Qualm is a synonym for scruples in misgiving topic. You can use "Qualm" instead a noun "Scruples".