Money

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Across
  1. 1. Noun form of lend
  2. 2. Pay by this instead of cash
  3. 3. Opposite of 'spend'
  4. 4. Money which is round and metal
  5. 6. Opposite of 'sell'
  6. 7. Money you leave for good service
Down
  1. 1. Opposite of 'borrow'
  2. 2. Dollars, Euros, Pounds are different types of this
  3. 5. Paper form of money