I am wondering if there is a difference between "geographic" and "geographical". My colleague, although not a native English speaker, informed me that there is a difference between "historic" and "historical", such as described here: Link, and that could extend to other terms.
The context is corporate diversification, where firms that are active in different countries are said to engage in "geographic" or "geographical diversification".
To clarify the difference to the existing question:
Furthermore: If there is a difference and I should use one, but not the other term, then how does that apply to "industrial diversification"? Would this become "industry diversification"?
More generally, are such differences between words as with "historic" and "historical" existing for all adjectives, or only a small number of them? How can these be recognized and constructed?