Concrete and abstract nouns

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Across
  1. 1. a community that is powered by a stand-alone electric generation and distribution system without the economic and reliability benefits of connection to a regional electric grid.
  2. 6. a small rubber or plastic boat that can be filled with air: a rubber raft.
  3. 7. Business; a company that fells trees and sells timber.
  4. 8. a person in charge of a forest or skilled in planting, managing, or caring for trees.
  5. 10. a person who explores a new or unfamiliar area.
Down
  1. 2. a traveler who makes a long arduous journey.
  2. 3. an area of low-lying, uncultivated ground where water collects; a bog or marsh.
  3. 4. a journey undertaken by a group of people with a particular purpose, especially that of exploration research, or war.
  4. 5. the possibility of suffering harm or injury.
  5. 9. a person or thing that achieves a better result or higher level than has ever been achieved before