Buoy is indeed a Boy!
And a quay is a key!
And a root is not a route, that IS a rowt, but a router can be a rooter as well as a plain router.
Plow may be plough, but cough is not Cow.
A toboggan is a hat, but then so is a took!
And a dollar North of the border is a Canadian Peso!
And how come it's not Lieu Z?