-igh2

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Across
  1. 1. tighten
  2. 3. enlightened
  3. 4. sigh
  4. 7. post-sunset twilight
  5. 8. righteous
  6. 9. highway
Down
  1. 1. height
  2. 2. brighten
  3. 5. nightmare
  4. 6. thigh