21st letter of the greek alphabet: crossword clues

Matching Answer
Confidence
PHI
60%
ETA
60%
RHO
60%
PSI
60%
OMEGA
60%
THETA
60%
CHI
60%
IOTA
60%
ZETA
60%
SIGMA
60%
e.g. Greek Cheese
e.g. O?D (Use ? for unknown letters)