How to turn plural words singular?

Question

I\'m preparing some table names for an ORM, and I want to turn plural table names into single entity names. My only problem is finding an algorithm that does it reliably. He

Answer 1

The problem is that's based on the general rules, but English has (figuratively) a billion exceptions... What do you do with words like "fish", or "geese"?

Also, the rules are for how to turn singular nouns to plurals. The reverse mapping isn't necessarily possible (consider "freebies").