I've found many different N-Gram lists, but never of any complete consonant-only or vowel-only N-grams. Lists generally combine consonants with vowels. Some lists also document what the pronunciation n-grams would be rather than the spelling. For clarity, here's what I'm looking for:

In the word "miaouing",

  • "m" is a consonant-only 1-gram

  • "iaoui" is a vowel-only 5-gram

  • "ng" is a consonant-only 2-gram

Does anyone know what I can find a complete, or near complete, list of such N-grams of english?

  • 1
    This might be difficult since, as mentioned in the answers to Impossible bigrams in the English Language, such lists can change depending on what rare words you include. I'm not sure I understand why a list that combines consonants with vowels would be unususable for your purposes; can't you just take such a list and use some program to automatically remove the ngrams that contain both consonants and vowels? Commented Jan 6, 2018 at 4:30
  • @sumelic I could, & I might resort to that. It just would've been simpler if someone else had done it already, haha. Yes, of course it's always an issue regarding what corpus/dictionary you gather data from. For this sort of thing, I'm inclined for either the Concise Oxford English Dictionary or the Enable2k North American word list. If I compile this myself, it'll likely be from the latter.
    – abcjme
    Commented Jan 6, 2018 at 4:44
  • 2 reasons why that may be: 1 vowel vs consonant is a bit context dependent in English, not a simple mapping 2 "n-gram" lists whether char- or word-level usually make no assumptions about these sorts of attributes. You may have better luck with "segments" or "sequences" or something else. Commented Jan 8, 2018 at 18:40

1 Answer 1


I think it is unreasonable to expect to find a ready-made list of that kind. Just take a generic n-gram list and use some filters (e.g. grep -E -v '[aeiou]' to get consonant-only patterns) to extract the n-grams of interest. The letter y may be a tricky case due to its dual nature, and you may even argue about the letter i in words like motion or the gh in words like sigh.

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