Silent letters

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Across
  1. 1. — Season of falling leaves, with a silent “n”
  2. 3. — Uncertainty that contains a silent “b”
  3. 6. — Follower or student, spelled with a silent “c”
  4. 7. — Proof of purchase featuring a silent “p”
  5. 9. — Young sheep with a silent final consonant
Down
  1. 1. — Move upward, quietly carrying a silent “c”
  2. 2. — Construct something, even though the “u” isn’t heard
  3. 4. — Prickly plant whose name hides a silent “t”
  4. 5. — Serious or dignified, ending with a silent “n”
  5. 8. — Landmass surrounded by water, spelled with a silent “s”