Well, from a linguistic standpoint you might think Hebrew has several dialects, including the Yemeni one - but we don't actually treat them as dialects, but more like accents or different pronunciation styles (at least for the most part, or for what I know). As far as I know, there aren't any words specific to neither of these "dialects", except maybe some foreign words mixed into the proper Hebrew speech. So, for example, I never seen the word "וואחם" and I don't think it's really an Hebrew word. It's either that someone transcribed a different word ("החם" maybe) in its phonetic style (which doesn't make it a word), or it could be some word borrowed from Yemeni Arabic - but still not part of Hebrew. I think it's the first, also I just found this http://shironet.mako.co.il/artist?type=lyrics&lang=1&prfid=8973&wrkid=20928 so...yes.