Ribbon.
rake
recover
Another word for copy that starts with an "R" could be reproduce. Hope that helps.
Rebus
retreat
try ruthless
rags
raiment
Rampage could be used as another word to describe forcefully pushing in or banging.
Ridicule: to laugh or make fun of something
The word is refraction. It happens when light rays pass from one material to another.
A six letter word for a bird of prey starting with the letter R is "raptor."