What do the following words have in common?

1. For
2. Sew
3. Dot
4. Gar
5. Aver
6. Pill
7. Plum
8. Host
9. Line
10. Out

Answer:

Each word can be followed by AGE to make a new word:

1. FORAGE
2. SEWAGE
3. DOTAGE
4. GARAGE
5. AVERAGE
6. PILLAGE
7. PLUMAGE
8. HOSTAGE
9. LINEAGE
10. OUTAGE