Good idea (just took some Syndol's - I think they're making me dopey!).
If you do have Acrobat Pro, it'll export the PDF to Word for you (though that can be a bit hit and miss in my experience). Otherwise, if you do have to start creating it again, Excel could be better if you want validation/pre-populating, or as BOAC says, calculations etc. There's also Microsoft InfoPath, but I don't really know anything about it.