Tag Archives: what do you call word without repeating letters

What is an Isogram?

alex atkins bookshelf wordsIt sounds like something you would encounter in geometry; however, an isogram is a word without any repeating letters. For example, the word isogram is well, an isogram. Word lovers and word puzzle enthusiasts challenge one another to find the longest isogram. The longest one contains 17 letters, subdermatoglyphic, meaning of or pertaining to the layer of skin beneath the fingertips. Below are some of the longest isograms that appear in dictionaries:

17 Letters:

16 Letters:

15 letters:

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