I'm not following what this has to do with word size. After some Googling, I can't find anything that says the 68k's word is anything but 16 bits.
Edit: I reread that part of the article and now your comment makes more sense. But I'm just pointing out it's interesting that in 68k assembly, a "word" is 16 bits.
Yes. Word is overloaded and with the 68k hybrid layout it’s confusing. As a type in 68k a word is 16 bits and a long word is 32bits. But the register word is 32bits.
Edit: I reread that part of the article and now your comment makes more sense. But I'm just pointing out it's interesting that in 68k assembly, a "word" is 16 bits.