Commodity should not be on the vocabulary page. (I was assuming the suggestion to put it on was a joke.)
It's not a Bitcoin specific term, and isn't relevant to Bitcoin at all, other than so people can argue about what it is/isn't/does/doesn't apply to.
They were joking, but I wasn't.
What should have been considered by someone sharper than me is Bitcoin's use of several "terms of art" that are near and dear to the legal/commercial community; "cash, money, trade, commerce, exchange, worth, dollar," etc., and so on. All of them carry a kharma that could be avoided by using a different term that I can't seem to recall at the moment.
But I see Bitcoin going ahead, unnecessarily exposing itself to their consequences. I've adjusted my expectations, and we'll see what happens.