Generally I don’t run into any problems with pronunciation in Korean, however last month I hit a couple of stumbling blocks with some (almost) homophones.
까치 (magpie) / 같이 (together)
운행 (service/transit) / 은행 (bank)
In order to distinguish these pairs, I really have to concentrate and think about how I am enunciating the words. Argh!
Do you know any more pairs of Korean words like this? I’m sure there are hundreds!