Guarantee gets me also (not this time thanks to you showing the way).

As for spelt, well isn't that a grain? And if you spelled it spelt then you spelled it correctly. Except that it is also the past and past participle of spell (Google told me that) so it is a word. One with more than one meaning. And that's wierd weird. Just like so many English words - weird, spelt, guarantee. Say them too many times and they even stop sounding like actual words. Ahhhhh.

Goddamn English language.