prefix for below: crossword clues

Matching Answer
Confidence
ALTO
60%
UNDER
60%
INFRA
60%
INTER
60%
OCTA
60%
TRE
60%
NEATH
20%
NEO
20%
ECO
20%
AERO
20%
e.g. Greek Cheese
e.g. O?D (Use ? for unknown letters)