Adding to Rena's: redder, bedder, header, spreader. A "bedder" can be a person whose job is making beds. A "header" can be something that goes at the top of every page, just as a "footer" can be something that goes at the bottom. A spreader is, of course, something that spreads; the first thing that comes to mind is a piece of farm machinery called a "manure spreader."

Cheddar (the cheese), shredder (e.g., a paper shredder)