Yeah, Google Docs counts hyphenated words as one, it's what I've been writing in. Let's me work from any computer, which is convenient for me.
I'm also a bit concerned that I'll hit the end of my book before I hit 50k! But, I also have 12,000 words which I wrote before November which I didn't count, so I'll have a lot of text. If I finish I may go back and edit and rewrite sections, and add any rewritten text on top of my existing word count to try to hit 50k through edits. Or something.