Another word I’ve grown to dislike: heighth. More accurately, it’s a non-standard pronunciation of “height” designed to make it vaguely rhyme with width and breadth. After all, shouldn’t the vertical equivalent to these also end with the “th” sound?
As it turns out, it once did. The obsolete spelling of height is highth and the obsolete pronunciation ends with the “th” sound. And by obsolete, I mean “went out of fashion in the 15th century.”