DO YOU REMEMBER THE SYNONYM?

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Across
  1. 2. RICH
  2. 6. UGLY
  3. 7. WEEK
  4. 8. SAFE
  5. 9. EASY
Down
  1. 1. EMPTY
  2. 3. BORING
  3. 4. OLD
  4. 5. HEALTHY
  5. 7. FAST