| Answer | Crossword Clue |
|---|---|
| PSI | Letter after chi |
| OMEGA | Letter after phi, chi, psi |
| PHI | Letter before chi |
| khi | a Greek letter, also CHI |
| PSI | Letter between chi and omega |
| PHI | Letter between upsilon and chi |
| chis | CHI, a Greek letter, also KHI |
| khis | KHI, a Greek letter, also CHI |
