The mispronunciation of height as heighth (with a th, rather than a t, sound at the end of the word) probably stems from the tendency to confuse it with similar words dealing with dimension, such as length, width, depth, and breadth. However, height is like the word weight in that it ends with only a t and not a th. (Listen)
[...] pronunciation Height, pronounced heighth | GrammarErrors.comHowever, height is like the word weight in that it ends with only a t and not a th. … Posted [...]