19th letter: crossword clues

Matching Answer
Confidence
ESS
95%
TAU
60%
ESSES
60%
POE
60%
TAUS
60%
HAYES
20%
ETA
20%
WOMEN
20%
RHO
20%
PSI
20%
e.g. Greek Cheese
e.g. O?D (Use ? for unknown letters)