vocabulary words

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Across
  1. 1. one special use among many
  2. 2. to hold information or keep
  3. 4. a word made from another word
  4. 5. a thought or idea
  5. 8. the opposite of another word
  6. 9. a chapter of definitions in the back of a book
Down
  1. 1. the same meaning but a different word
  2. 3. able to bring a result
  3. 6. words particular to a certain subject
  4. 7. how to find out the meaning of the word