National Puzzle Day

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Across
  1. 4. Loosely defined geographical areas
  2. 6. Lost luggage [two words]
  3. 7. Revolutions per minute [acronym]
  4. 10. A popular 1959 song by Dinah Washington [acronym]
Down
  1. 1. A collection of valuable or delightful things
  2. 2. From Old French meaning ‘to count’
  3. 3. Remaining fresh and vital
  4. 5. Always concerned about your work friends
  5. 8. From Latin and Old French, literally ‘dead pledge’
  6. 9. Building the best ________