Hint: Emotions and feelings
The answer to this puzzle is:
1. DISGUST
2. CURIOSITY
3. RELIEF
4. CRUEL
5. HUMILITY
6. OPTIMISM
7. HAPPY
8. STRESS
9. RAGE
10. GRUMPY
11. FAITHFUL
12. ANNOYED
13. LOVE
2. CURIOSITY
3. RELIEF
4. CRUEL
5. HUMILITY
6. OPTIMISM
7. HAPPY
8. STRESS
9. RAGE
10. GRUMPY
11. FAITHFUL
12. ANNOYED
13. LOVE