Sience - find opposites

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Across
  1. 3. someone, who never made anything new (noun)
  2. 5. unproductive (adj)
  3. 6. something what is known to all, nothing new (noun)
  4. 7. teacher (noun)
  5. 8. download (verb)
Down
  1. 1. clean, healthy (adj)
  2. 2. loss, injury, damage, destruction
  3. 4. stability(noun)
  4. 6. no change, staying at the same level (verb)