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

• energized
• energizer
• energizers
• energizes
• energizing
• energumen
• energumens
• energy
• energy drink
• energy drinks
• energy gap
• energy gaps
• energy level
• energy levels
• energy-mass equation
• enervate
• enervated
• enervates
• enervating
• enervation
• enervations
• enervative
• enerve
• enerved
• enerves