Words with silent letters

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Across
  1. 3. The opposite of "correct"
  2. 5. Speak
  3. 6. Have information about something or somebody
  4. 8. The opposite of "go down"
Down
  1. 1. Familiar/recognized
  2. 2. A mark
  3. 3. Go/step
  4. 4. The season before winter
  5. 7. An action that can be done with a pencil or pen