Here are a few I found in my Strong's Dictionary (gives original Hebrew and Greek meanings of the words used in KJV translation). (Old Testament) to WHISPER (a spell), ie to INCHANT or practice magic. MAGIC. DIVINATION, ORACLE. In the New Testament, PHARMAKEIA is the original Greek word, rendered "witchcraft" in KJV. It means MEDICATION ("pharmacy") and by extension MAGIC (lit or fig).
If you simply take all the things Pharoah's magicians did in trying to emulate the works of Moses, I think it's pretty clear that we're talking about the same thing, translations notwithstanding.
Since when are you a Greek scholar? The pharmokeia to which you refer involves as you said medication i.e. medicines to cure illness by what sense does that come to mean witchcraft? The context and meaning don't fit your definition. Moreover words change meanings overtime I think you need to spend time with more than just the Bible and your copy of Strong's ( here's one for you study the meaning of the word "let")