Suffix: -s / -es

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Across
  1. 2. plural form of "city"
  2. 4. plural form of "pencil"
  3. 6. plural form of "fox"
  4. 8. CHALLENGE: plural form of "cactus"
  5. 10. plural form of "street"
  6. 11. plural form of "reflex"
Down
  1. 1. CHALLENGE: plural form of "matrix"
  2. 3. plural form of "French fries" (no space needed)
  3. 5. plural form of "inbox"
  4. 7. CHALLENGE: plural form of "mouse"
  5. 9. plural form of "car"
  6. 10. plural form of "spy"