| Answer | Crossword Clue |
|---|---|
| RHOS | Certain Greek consonants |
| THETAS | Certain Greek consonants |
| SIGMAS | Greek consonants |
| BETAS | Greek consonants |
| PHIS | Greek consonants |
| TAUS | Greek consonants |
| CHIS | Greek consonants |
| THETAS | Greek consonants |
| RHOS | Greek consonants |
| PSIS | Greek consonants |
| PIS | Greek consonants |
| MUS | Greek consonants |
| XIS | Greek consonants |
| ZETAS | Greek consonants |
| NUS | Greek consonants |
| NUS | Some Greek consonants |
| THETAS | Some Greek consonants |
| RHOS | Some Greek consonants |
| PIS | Greek consonants used in circle formulas |
