Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
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A “butt” was a Medieval unit of measure for wine. Technically, a 'buttload' of wine is about 475 liters, or 126 gallons.
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The word "listen" contains the same letters as "silent."
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Anuptaphobia is the fear of staying single.
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The word 'mortgage' comes from a French law term that means 'death pledge'.
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A group of ferrets is called a business.
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The word "impossible" dropped in use by 50% over the course of the 20th century
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