Spelling words

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Across
  1. 2. collection of poems
  2. 6. drug obtained from opium
  3. 8. herbaceous plant
  4. 11. calm
  5. 12. a change in a rock
  6. 13. categorization
  7. 16. to make evident
  8. 17. growth cycle of plant
  9. 18. doing a good job
Down
  1. 1. study of the forms of things
  2. 3. part of a stamen
  3. 4. exploiting chances
  4. 5. distinct
  5. 7. quality of being improbable
  6. 9. obvious
  7. 10. relating to
  8. 14. flowering period of a plant
  9. 15. decreases in force
  10. 16. morphological unit of a language