What's the missing word?

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Across
  1. 2. not a .... was stirring, not even a mouse
  2. 3. and filled all the ...; then turned with a jerk
  3. 5. and mama in her ..., and I in my cap
  4. 7. when they meet with an ...,mount to the sky
  5. 10. and then in a ..., I heard on the roof
  6. 11. his droll little ... was drawn up like a bow
  7. 12. I knew in a ... it must be St Nick
  8. 14. and giving a nod, up the ... he rose
  9. 16. while ... of sugar plums danced in their heads
  10. 17. and the ... of his chin was as white as the snow
Down
  1. 1. that shook when he ..., like a bowl full of jelly
  2. 4. happy ... to all, and to all a good night
  3. 6. away to the window I flew like a ...
  4. 8. he was chubby and ..., a right jolly old elf
  5. 9. A ... of toys was flung on his back
  6. 13. but I heard him ..., ere he drove out of sight
  7. 15. and laying his ... aside of his nose