Scruple
Else clues• Apprehension
• Apprehensive feeling
• Compunction
• Disturbing feeling
• Feeling of uneasiness
• Misgiving
• Pang of conscience
• Pang or misgiving
• Reservation
• Sudden disturbing feeling
• Twinge of conscience
• Uneasy feeling
• Uneasiness about the fitness of an action
• A mild state of nausea