Here are the appropriate forms of the words to fill in the blanks:

1. Iceland is considered the most **peaceful** country in the world. (peace)
2. A **nomadic** lifestyle has its advantages and disadvantages. (nomad)
3. My brother has been a stamp **collector** for several years. (collect)
4. It is a/an **inconvenient** place to hold a picnic because it is too far from the road. (convenience)
5. Drinking water in some areas may be **unsafe**. (safe)
6. During my stay in the village, I was **friend** with several local farmers. (friend)
7. Encouraging children to eat and drink **health** is very important. (health)
8. Local people in the village often wear their **traditional** costume during the festivals. (tradition)
9. Please give **generously** to that charity to help the homeless after the flood. (generous)
10. The baby slept very **soundly** because the bed was really comfortable. (sound)

Feel free to ask if you need further assistance!