How to spell RIOMMA correctly?

There are a few possible correct suggestions for the misspelling "riomma". It is possible that the intended word was "rima", meaning a narrow slit or opening. Another possibility is "rioma", which is a misspelling of "riuoma", an Italian word meaning ravine or gully. "Rioma" could also be a misspelling of "roma", the Italian name for the city of Rome.