1. person causing sabotage or intentional damage to property.   Hint First letter clue   2. person who is helpless and homeless; abandoned child.   First letter clue   3. doctor specializing in mental disorders.   First letter clue   4. unprincipled person or one given to sin.   First letter clue   5. one who walks in one's sleep.   First letter clue   6. person suffering from severe mental disorder.   First letter clue   7. teacher or pedant.   First letter clue