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

• banians
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• baning
• banish
• banished
• banishes
• banishing
• banishment
• banishments
• banister
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• banjax
• banjaxed
• banjaxes
• banjaxing
• banjo
• banjoes
• banjoist
• banjoists
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• banjulele
• banjuleles
• bank
• bankabilities
• bankability