mumpsimus /mumpˈsi-məs/

1. A view or opinion stubbornly held, even when shown to be misguided
2. A person holding such a view, or one adhering stubbornly to old ways

• platinize
• platinized
• platinizes
• platinizing
• platinoid
• platinoids
• platinotype
• platinotypes
• platinous
• platinum
• platinum black
• platinum blacks
• platinum-blond
• platinum blonde
• platinum blondes
• platinum disc
• platinum discs
• platinum lamp
• platinum lamps
• platinum metal
• platinum metals
• platinum parachute
• platinums
• platinum sponge
• platitude