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A vowelless word is an authentic English word spelled without any of the five standard vowel graphemes (A, E, I, O, U), typically relying on the semi-vowels Y or W.
English syllable phonology requires a vocalic nucleus. In vowelless words, this nucleus is filled either by the semi-vowel 'y' representing an unrounded front vowel sound (/ɪ/ or /aɪ/), or by the Welsh borrowing 'w' representing /uː/. The longest recognized non-scientific vowelless word is 'twyndyllyngs' (12 letters, Middle English/Welsh for twins), followed by 'symphysy' (8 letters) and common 7-letter words like 'rhythms' and 'glycyls'.
Authentic words spelled without the vowels A, E, I, O, or U
12-letter Middle English/Welsh plural meaning twin-born offspring.
8-letter medical term for the fusion or growing together of bones.
7-letter common English plural denoting measured movement and beat.
7-letter biochemical univalent acyl radical of glycine.
Test any word to verify if it contains zero standard vowels (A, E, I, O, U):
Verified English words exemplifying vowelless words (lipograms) with Scrabble scores
Linguistic definitions, etymological origins, and tournament usage
Yes. Words like "rhythm", "glyph", "crypt", and "spry" use 'y' as a vowel sound, while Celtic borrowings like "cwm" and "crwth" use 'w' as a vowel.