Possible Duplicate:
Why is it “geometric” but “theoretical”?
“Electric” vs. “electrical”
I think I'm clear on the difference between word pairs such as elector and electoral, where the latter pertains to the former, I'm not sure if the same rule applies to the following examples:
- Numeric vs. numerical
- Electric vs. electrical
Is the relationship between these the same as e.g. elector and electoral?