Right from the start I had a feeling there was a specific word that I just couldn't think of. No word that's been suggested so far has struck me as "that's the word!", so either we just haven't got to it yet or there never was one. The closest common word is "loaded". That's just a little more general than the strict sense I was looking for, but it'll do for most purposes. The most directly accurate word, I think, was "sophistry", but I haven't been able to come up with an adjective based on it.

Does this mean we can make up a word and enter it into the dictionary?

I'll bet it's a Latin word, the dead language.