| Answer | Crossword Clue |
|---|---|
| DECA | Octa- + two |
| HEXA | Octa- minus two |
| DECA | Octa- plus two |
| TETRA | Octa- divided by two |
| HEXA | Two less than octa- |
| SEPTA | Octa preceder |
| GON | Suffix with octa- |
| DECA | Bi- plus octa- |
| TETRA | Half of octa- |
| SEPTI | Octa- minus one |
| NONA | Octa- plus one |
| TETRA | Half of octa |
| ENNEA | Octa- plus one |
| HEPTA | Octa- minus one |
| ENNEA | Between octa and deca |
