The word levidrome was coined by seven-year-old Levi Budd, a Grade 3 student at St. Michaels University School, to describe a word that spells another backward — such as loop and pool.

The word "uncertainty" also made a dramatic appearance throughout the latest version of the Fed’s Beige Book, an anecdotal view of economic conditions in local districts across the US.

President Donald Trump took credit for creating a new word after issuing an executive order to lower drug prices in the United States. But the word has been used for centuries.