Solutions Unprincipled has 5 entries with similar clues

• 5-letter words
• rogueUnprincipled person
• 9-letter words
• scoundrelAn unprincipled person
• reprobateAn unprincipled person
• 11-letter words
• black-sheepUnprincipled reprobate
• 12-letter words
• snollygosterUnprincipled but shrewd person