the '-nym' suffix

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Across
  1. 4. A word formed from the first letters of a phrase (e.g., NASA).
  2. 6. A word with the same or similar meaning.
  3. 8. A word with two opposite meanings (e.g., "bolt" meaning to secure or to flee).
  4. 9. Words that sound/spell the same but have different meanings
Down
  1. 1. A fictitious or false name (pen name).
  2. 2. A person or thing after which something is named.
  3. 3. A name for a resident of a specific place (e.g., Kiwi, Athenian).
  4. 4. A word with the opposite meaning.
  5. 5. A person's name that is ironically or fittingly suited to their profession (e.g., Dr. Cutt).
  6. 7. A name created by spelling another name backward (e.g., Yrogerg for Gregory).