Across
- 2. Ogdoad
- 5. Eight's follower, CB Radio style
- 7. Nine-minus-eight's sum
- 8. Octad parts
- 10. Niner Eighter = Er, what?
Down
- 1. Last in Henley, German eight's boat
- 3. Octad in a gallon
- 4. Old number eight's heel on loose footwear (3,3,3)
- 6. Octad plus one
- 9. Eight's cube root