Fascism doesn't necessitate the government takeover of corporations. In fact, if you look at the fascist nations in the past you see that Fascism and Corporatism go hand in hand. The only difference is if you are in a corporation that is aligned with the dictator, or not. With those in the 'not' category likely on a short list to a ride at the gallows.
In popular use, fascism is associated with the right-wing growth of government, where as communism is associated with left-wing growth of government. Public schools, welfare, socialized healthcare are all associated with communism. Patriotism, the military industrial complex, views of racial superiority are all associated with fascism.
Communism, in theory, is the exact opposite of Fascism. There is no central authority in communism. There is no dictator, there are no CEOs, there are no gentry, there is only the commune.
The problem with communism, much like libertarianism is in the act of implementing it. Any "true" communism or libertarian utopia implementation would immediately create a power void. That power void would be filled in very short order, and typically by the person or party you would absolutely least like to be in it.
In both cases, power consolidates. In communism with the state, in libertarianism with the corporations, to the point that eventually, both systems will either collapse or result in some form of absolute central control (quite likely fascism).
Both systems can work fine in very small communities, where a small number of close-knit people who all respect and trust each other can get by. But as soon as they are applied to a larger group, they fall apart.
It's understandable that you are unaware of the century of history and nuance that have occurred in the development of communism and fascism, but if you stop listening to Glen Beck and pick up a book, you may learn something :)