Sorry, I wasn't clear what I meant with cauterize and crystallize. I
didn't mean that the -ise endings were wrong, just that they are not the
most common spellings. Presumably a spelling checker should allow
either. At the moment, the Ubuntu dictionary only allows the less
common -ise form.
On
My Compact OED lists "cauterize (also cauterise)" and "crystallize (also
crystallise)", as it does for -ize/-ise words in general, with no
special note. (-ize, of course, is not exclusively American English, and
is also preferred by Oxford dictionaries, but I'd expect an indication
if the -ise vari