I've heard all of the above words with X as zeh. Is that an American English thing? What's the correct way to pronounce each word?
closed as general reference by Matt Эллен, Mitch, z7sg Ѫ, kiamlaluno, Hugo Jan 9 '12 at 13:49
This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information. See the FAQ for guidance on how to improve it.
When the letter x is in the very beginning of the word, the standard way to pronounce it is /z/. This pronunciation is standard English, it isn't restricted to dialects or countries. When its position in a word is other than the very beginning, then the letter x is pronounced /ks/ as in expect or fox.
EDIT upon comment: There are certain for which the /ks/ sound doesn't apply for the letter x. Exaggerate is a good example, as well as the word example itself, where x is pronounced /gz/.