LESS IS MORE XII

In this puzzle, the lowest score wins. Add at least one letter to both sides of the letter groups below to form the shortest possible common words. Plurals ending in S and proper names are not allowed. It can be done by adding 22 letters. 

1. _____ DM _____

2. _____ BU _____

3. _____YMB _____

4. _____ URF _____

5. _____ THO _____

6. _____ BRI _____

7. _____ TL _____

8. _____ NCI _____  

(Possible) Answers: 

1. ADMIT

2. ABUT

3. SYMBOL

4. CURFEW

5. ETHOS

6. DEBRIS

7. ATLAS

8. RANCID