Allow entities with "-ate" suffix to match to "-ic acid"

[maxkfranz]

There are several entities that end in "ate" that a user would type when he really means the corresponding acid. For example, a user might type "lactate" to mean "lactic acid". Or he might type "citrate" to mean "citric acid".

Since this seems to be a one-way issue, we should allow for the transformation only in the ate-to-acid direction. The acid-to-ate direction should not be allowed.