1. reservoir lake used to store water for community use
  2. reservation the act of setting aside for some future occasion
  3. reserved set aside for the use of a particular person or party
  4. servitor someone who performs the duties of an attendant for someone else
  5. observatory a building equipped to view astronomical phenomena
  6. reservedly with reserve; in a reserved manner
  7. conservatory a schoolhouse with special facilities for fine arts
  8. conservatoire a schoolhouse with special facilities for fine arts
  9. preservative tending or having the power to protect or prevent decay
  10. conservator the curator of a collection, as in a museum or library
  11. conservative resistant to change
  12. preservation the activity of protecting something from loss or danger
  13. reserve assets capital held back from investment in order to meet probable or possible demands
  14. reserve hold back or set aside, especially for future use
  15. desert leave someone who needs or counts on you; leave in the lurch
  16. deserter someone who betrays or abandons a cause or person
  17. preserver rescue equipment consisting of a buoyant belt or jacket to keep a person from drowning
  18. reserves civilians trained as soldiers but not part of the regular army
  19. reservist a member of a military reserve
  20. servitude state of subjection to an owner or master