This article investigates 10-letter words which consist of the same letters (in any order) in their first and second halves except for one letter, the 'odd one out'. In SEPTUPLETS, the letters S, E, P, and T are repeated in the second half of the word; L is the odd one out. This is a perfect example, the word is solid, familiar and all the letters of the first half are different. In many cases, however, the same letter appears twice within either, or both, the first and second halves of the word. Where this happens, as the letter E in the second half of METROMETER, the word will fill more than one letter pattern.
"Odd One Out,"
Word Ways: Vol. 42
, Article 23.
Available at: https://digitalcommons.butler.edu/wordways/vol42/iss3/23