Is there a word for fake words?

[Vinyadan]

To submit yet another answer to the original query, do eggcorns fit?

That looks to me like the effect of folk etymology, like the goshawk akupter (fast wings) turning into accipiter (grabber) and then avipiter (avis = bird > aoutour) because the speaker tries to make the word make sense. I mean, I don't see the difference from folk etymology, even though Wikipedia wants there to be one.

EDIT: "It's not a folk etymology, because this is the usage of one person rather than an entire speech community." So I guess this excludes it from irregardless at least. But I find this definition faulty, given that there are idiolects and so on. It seems like saying that a flower isn't red because there aren't enough flowers.