Give the corresponding words for the following definitions
1. ...- to make up
2. ...-a person who lives in a town or country
3. ...-a line separating two countries
4. ...-a narrow passage of water connecting two seas
5. ..-a mountainous country
6. ...-a river which flows into another river
7. ...-a starting point of a river
8. ...-a stretch of water joining two seas
9. ...-a chain of mountains