plurals with -oes

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Across
  1. 5. A keepsake or a souvenir
  2. 7. A number that means 'nothing'
  3. 9. The reflection of a sound
  4. 10. A pink bird with a long neck
  5. 11. Musical instruments that you play using a keyboard.
  6. 14. An insect known for leaving itchy bites
  7. 15. A hill or mountain with hot lava
  8. 16. A person who shows great courage
Down
  1. 1. A very important food that grows under the ground
  2. 2. A word we say when greeting someone
  3. 3. Round, red vegetables used to make sauce
  4. 4. Electrical appliances that can play music
  5. 6. Whirlwind
  6. 8. Underwater missiles
  7. 12. Recordings of moving pictures
  8. 13. A big, flightless bird that went extinct in 1690
  9. 14. Oval tropical fruit