Plough. Rhymes with Bough.
Hey, you found the only one! 
Not the only one . Plough also rhymes with Slough 
(as in London Borough of Slough. It doesn't rhyme with borough though, not with either of those words cos that would be silly wouldn't it? )
I'm pretty sure more weird limey examples don't count. 
I beg to differ. I'm a weird limey, and I count. Allow me to demonstrate: one, two (forget the "w" , just there for show. "buckle my shoe" is what it rhymes with, actually) , three, four (does not rhyme with sour, but with door) , five, six , seven, eight (pronounced "ate", mate ) nine, ten, a big fat hen ....etceteras

shall i continue?
