I think you're playing semantic games. Buying stock in a business is investing in it. Either you're buying new issuance, in which case it goes straight into the company's bank account, or you're increasing the stock's price, thereby increasing the price at which new issuance can be expected to be made, not to mention other things like stock options for incentives / hiring, etc.
The other investment is lending, but I don't think you're suggesting that Buffet is primarily making money buying bonds, or getting even more involved with short-term loans.
You and Sam_Odio are both correct, it is a semantic argument (and I do realize at the end of the day its all stock...)
I consider Buffet's traditional buy-and-hold strategy to be a different form of investing then those that tend to buy based solely on the expected performance of the stock price.
Buffet isn't buying based on the expected performance of the stock price + dividends? Maybe buffet has a longer time horizon than most investors, but that's the only real difference I can see.
The other investment is lending, but I don't think you're suggesting that Buffet is primarily making money buying bonds, or getting even more involved with short-term loans.