Unfortunately no. They are completely different object types. The only thing they have in common is that they can be used as buttons.
You should explain to your client that SWF and anything Flash is unlikely to work after the end of this year and in many cases will not work for end users even now because many browser manufacturers have already stopped supporting Flash.
So although your client might like the idea of an interactive PDF, they need to consider the fact that all the work creating it is likely to be wasted, and their attempt to use it will probably end up causing a deluge of complaints and support calls that will make them look foolish for even attempting it.
YOU on the other hand will look very up-to-date for telling them NOT to go that route. So all is not lost, eh?