While "expat" and "expatriate" are commonly used, I also often see "ex-pat" in news articles:
- So You Think You Can Be An Ex-Pat? Forbes
- Australian ex-pat writer and TV critic Clive James dead at 80 Japan Times via Reuters
What is the origin of "-" between "ex" and "pat"?
Note: When I copy/paste this character from the Forbes article into Wikipedia, I am redirected to Hyphen-minus.