What other words are spelt different in “American English” to “English-English” spellings?
Any word that ends in ise in UK English, such as customise, will end in ize in American. Also US English has some words ending in ize that don’t exist in UK English – burglarize springs to mind. Words ending our in UK English (colour, candour, demeanour) drop the u. The English disc becomes disk, except in the case of compact disc. Words that end in gue in UK English (eg analogue and dialogue) drop the ue in American. However, when using some words in a way specific to computers UK English uses some American spellings – dialog box is correct, as are hard disk and program, which is normally programme in English.