The today’s paper of the day is actually more a notification than a scientific paper. It is a reminder of the fact that isograms exist. Isograms are words in which each letter, which is in the word, is exactly n times in word. Means: The most prominent isograms are the n=1 isograms (the nonpattern words). For “short” words there are still plenty n=1 isograms (e.g. “boyfriends” with 10 letters). More complicated it becomes for longer words (more than 14 letters) in English, as English has just 26 letters at all. The longest English n=1 isogram is “subdermatoglyphic” with 17 letters, but it is not a common word but more a word creation. In languages with more letters even longer n=1 isograms exist. For example, in German with the additional letters “ä”, “ö” and “ü”, the longest common German n=1 isogram is “Büroflächenumsatz” with 17 letters but there are of course also longer n=1 isogram word creations. The longest is “Heizölrückstoßabdämpfung” with 24 letters. There are also n=2 and n=3 isograms, but finding them is quite complicated. While there are still some examples for n=2 isograms, like "Anna" and "Otto" and “concisions” and “horseshoer”, there are nearly no n=3 isograms. One example would be “deeded”. But maybe you can find some more? "An Overview of Isograms."
Dmitri A. Borgmann Word Ways 7.1 (1974): 10.
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