There are some words which people have a tendency to mispronounce over and over again. Over at Oxford Dictionaries Blog, they have a collection of six words that everyone pronounces wrong. These are:
I know I’m guilty of mispronouncing a couple of these. For a long time, I said eXpresso rather than eSpresso, and kee-no-ah rather than keen-wah for quinoa. It’s true about sherbet and prescription as well; I pronounce them like it mentions in the blog, with a second R in sherbet and as “pruh” at the start of prescription.
The description of nuclear is amusing to read as well. Onwards!