Sub- & Super- Prefixes

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Across
  1. 1. below the correct standard
  2. 3. a vessel that travels underwater
  3. 6. someone who is very famous
  4. 7. an underground railway system
  5. 8. larger in size than normal
  6. 9. to put underwater
Down
  1. 1. glue with greater strength than regular glue
  2. 2. a title under the main heading
  3. 4. a person with greater power than others
  4. 5. a store selling a greater number of items than small food stores