1. across the nation extending throughout an entire nation
  2. consternation sudden shock or dismay that causes confusion
  3. procrastination putting off or delaying an action to a later time
  4. extenuation a partial excuse to mitigate censure
  5. extension act of expanding in scope
  6. accreditation the act of granting official approval or recognition
  7. abstention the trait of avoiding some substance or activity
  8. coordination regulation of diverse elements into a harmonious operation
  9. contention the act of competing as for profit or a prize
  10. agglutination the coalescing of small particles that are suspended in solution; these larger masses are then (usually) precipitated
  11. concatenation the act of linking together as in a series or chain
  12. incrustation the formation of a hard outer layer
  13. encrustation the formation of a crust
  14. cross-division classification according to more than one attribute at the same time
  15. indignation a feeling of righteous anger
  16. cross-pollination fertilization by transfer of pollen from the anthers of one flower to the stigma of another
  17. oxygenation the process of providing or combining or treating with oxygen
  18. cross section a section created by a plane cutting a solid perpendicular to its longest axis
  19. cross-section representing a plane made by cutting across something at right angles to its length
  20. coextension equality of extension or duration