> irony (ˈaɪənɪ) adj: of, resembling, or containing iron.

In all seriousness, if we want to get nitpicking let's go back to the fact that the word comes from the Greek eirōneia, which means feigned ignorance, which in turn comes from the Greek eirōn, dissembler. I'd then argue that naming things silly names can be called ironic if the story world feigns ignorance of them being silly.