Tx - Literacy - Suffixation - <y> to <i> - <-ness> <-ly> <-est>

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Across
  1. 1. the most sticky
  2. 4. in an angry way
  3. 5. the state of being grumpy
  4. 7. the most lonely
  5. 9. the most nasty
  6. 10. in a greedy way
  7. 11. the state of being happy
  8. 12. in a guilty way
Down
  1. 2. the state of being tricky
  2. 3. the state of being friendly
  3. 6. the most pretty
  4. 8. in a crazy way