Hint: Compound words
The answer to this puzzle is:
1. FLAGPOLE
2. ANYONE
3. MOCKUP
4. FOOTNOTE
5. FAREWELL
6. MAILMAN
7. BACKPACK
8. INSIDE
9. OVERKILL
10. BASEBALL
11. SKYLINE
12. CATFISH
13. BREAKUP
14. PIGPEN
2. ANYONE
3. MOCKUP
4. FOOTNOTE
5. FAREWELL
6. MAILMAN
7. BACKPACK
8. INSIDE
9. OVERKILL
10. BASEBALL
11. SKYLINE
12. CATFISH
13. BREAKUP
14. PIGPEN