[octatoan]

I don't know why, but I was able to recognize the non-words instantly (with one exception) even though I didn't know the meaning of every single "real" one. (Peristeronic, etc.)

Perhaps a remnant of my spelling-bee days.

[skykooler]

I knew "Peristeronic" was a real word, because I'd seen it somewhere before. Turns out it was another xkcd: https://xkcd.com/798/