Chewtobacca said:

TV's Frink said:

Add further vs. farther to the list.

I don't agree with this one. They are interchangeable and always have been. Further is more common in abstract senses, but that is about it; unless you meant that farther cannot be used a verb, which is true, but I have never heard it used as such.

usage Farther and further have been used more or less interchangeably throughout most of their history, but currently they are showing signs of diverging. As adverbs they continue to be used interchangeably whenever spatial, temporal, or metaphorical distance is involved. But where there is no notion of distance, further is used further refined>. Further is also used as a sentence modifier <further, the workshop participants were scarcely optimistic — L. B. Mayhew>, but farther is not. A polarizing process appears to be taking place in their adjective use. Farther is taking over the meaning of distance farther shore> and further the meaning of addition further invitation>.

I always thought they were in no way interchangeable. Guess I was at least partially wrong.

What about Farger vs. Father, Judge D. Evil presiding?