By the way, an antifascist/communist I met while in prison told me that libertarian used to be a label used by early communists. It seems like a somewhat incorrect label to me, librium rather than libertas. The essence of communism is that someone 'outside' society can objectively weigh the distribution of inputs and outputs. A lot of latin roots get muddled because of their similarities.
Capitalist is another one. I got this muddled myself - carpe vs capit, to grasp, and the head. The french word 'entrepreneur' relates to the first, the second is related to the idea of plutocracy.
Very interesting. It's always fun to learn about where our words come from.