Excalibur - 4
Fence
Fighter
Dragon
Belt - don't see anything else that fits
DARPA - 2
Washington - seems assuming it's a government program is as good a bet as any
???
feet - unlimited
Penguin - Happy Feet, the only questionable bit is feet not being capitalized
Tap - dancing
Web - webbed feet
Track/Beach/Park - running or walking connection
We need five. I think Belt, Washington, Tap should be good. I am reasonably confident with Penguin.