Shape Shuffle (by Dav Pilkey)

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Across
  1. 3. Solid shape with two straight sides and two long ends.
  2. 5. Solid shape that has six sides. Rhymes with "tube".
  3. 7. Solid shape with four sides and a square at the bottom. Sounds a lot like "period".
  4. 8. Like a cube, but is longer. Rhymes with "autism".
Down
  1. 1. Keep something steady.
  2. 2. Long and hollow, like I said at word one.
  3. 3. Joined or linked together. Rhymes with "selected".
  4. 4. Curved, coiled shape. Rhymes with "viral".
  5. 6. Solid shape without edges. Rhymes with "fear".