Has to be F*S* so that the prefix can stay the same.
Some ideas, please add more (please check that they don't already exist in the USPTO database, EU trademarks database or Google)
Rejected:
FlipSide (NO trademarked)
FreeStream (is a pr0n site, oops)
FarScape (TV show)
Olivier doesn't like:
Should we make a list of F words and a list of S words and consider each member of the Cartesian product?

