English guards its vowels closely. Of the 172,823 words in the list this site's tools use, only 121 contain none of A, E, I, O or U, and only 20 of those manage without leaning on Y either. Both lists are on this page, complete. One idea runs through all of them and is worth grasping before the tables: no spoken word on either list lacks a vowel sound. What these words lack is a vowel letter, and the sound is smuggled in by Y, by W, or by the consonants themselves.
All 121 words with no A, E, I, O or U
| Length | Words |
|---|---|
| 2 letters (5) | BY, HM, MM, MY, SH |
| 3 letters (29) | BRR, BYS, CRY, CWM, DRY, FLY, FRY, GYM, GYP, HMM, HYP, NTH, PHT, PLY, PRY, PYX, SHH, SHY, SKY, SLY, SPY, STY, SYN, THY, TRY, TSK, WHY, WRY, WYN |
| 4 letters (27) | BRRR, BYRL, CWMS, CYST, DRYS, GYMS, GYPS, HYMN, HYPS, LYNX, MYTH, PFFT, PSST, RYND, SCRY, SPRY, SYNC, SYPH, TSKS, TYPP, TYPY, WHYS, WYCH, WYND, WYNN, WYNS, XYST |
| 5 letters (36) | BYRLS, CRWTH, CRYPT, CYSTS, DRYLY, FLYBY, GHYLL, GLYPH, GYPSY, HYMNS, LYMPH, LYNCH, MYRRH, MYTHS, MYTHY, NYMPH, PHPHT, PSYCH, PYGMY, RYNDS, SHYLY, SLYLY, STYMY, SYLPH, SYNCH, SYNCS, SYNTH, SYPHS, THYMY, TRYST, TYPPS, WRYLY, WYNDS, WYNNS, XYLYL, XYSTS |
| 6 letters (21) | CRWTHS, CRYPTS, FLYBYS, FLYSCH, GHYLLS, GLYCYL, GLYPHS, LYMPHS, MYRRHS, NYMPHS, PSYCHS, RHYTHM, SPRYLY, SYLPHS, SYLPHY, SYNCHS, SYNTHS, SYZYGY, TRYSTS, TSKTSK, XYLYLS |
| 7 letters (3) | GLYCYLS, RHYTHMS, TSKTSKS |
The shape of the table is the story. The words get scarcer as they get longer (36 at five letters is the peak, and only three reach seven), and nothing at all reaches eight. Vowels are not decoration in English spelling; they are the scaffolding, and a word built without them runs out of material fast.
The hard core: no vowels and no Y either
Strip Y away as well and twenty words survive. Most are written sounds rather than ordinary vocabulary, and the exceptions are the famous ones: two Welsh borrowings where W does the vowel's job.
| Word | Meaning |
|---|---|
| HM | A sound of thinking or doubt |
| MM | A sound of pleasure or agreement |
| SH | A call for silence |
| BRR | A sound for feeling cold |
| CWM | A steep bowl-shaped hollow in a mountain, carved by a glacier (from Welsh) |
| HMM | A sound of thinking |
| NTH | Last or greatest in an endless series, as in 'to the nth degree' |
| PHT | A dismissive puff of a sound |
| SHH | A call for silence |
| TSK | A sound of disapproval, made with the tongue |
| BRRR | Feeling cold, said with more shiver |
| CWMS | Plural of cwm |
| PFFT | The sound of air escaping, or of something fizzling out |
| PSST | A quiet sound made to attract someone's attention |
| TSKS | Makes the tsk sound |
| CRWTH | An ancient Welsh stringed instrument, played with a bow |
| PHPHT | A stronger form of pht |
| CRWTHS | Plural of crwth |
| TSKTSK | The tsk sound repeated, in disapproval |
| TSKTSKS | Plural of tsktsk |
CWM and CRWTH deserve their fame. Welsh spelling treats W as a vowel in its own right (it spells the sound in 'koom'), so both words are perfectly regular at home and only look impossible in English dress. The TSKS family is the other curiosity: English writes down the tongue-click of disapproval, stacks it into TSKTSK for emphasis, and then, because the list allows plurals, TSKTSKS walks in as a seven-letter word with no vowel and no Y, sharing the longest-word honour with RHYTHMS.
How Y does the work
The other 101 words on the list hand the vowel's job to Y, and Y is good at it because it can spell several vowel sounds. In BY and MY it is the long I sound. In GYM, MYTH and LYNX it is the short I. In RHYTHM it is the muffled sound at the word's centre, and SYZYGY runs the trick three times in six letters, which is why it is the connoisseur's favourite of the set: the alignment of three heavenly bodies, spelled with no true vowel and three stand-ins. At word endings, in SHYLY, DRYLY, SLYLY and SPRYLY, Y even lets adverbs form in the usual LY way while the root stays vowel-free.
For players, the practical version of all this is short. A rack with no vowels is not a dead rack if it holds a Y, and the words above are the proof: TRYST, GLYPH, CRYPT and their kin are playable, scorable words that beginners throw back because the rack looks wrong. The Word Unscrambler searches the same list and will surface them from your letters; the companion list at the other extreme, words with all five vowels, shows what the scaffolding looks like when every vowel turns up at once.
How rare is rare
Some calibration, because lists like this invite exaggeration. One hundred and twenty-one words out of 172,823 is seven in every ten thousand, so a vowel-free word is a genuine rarity in the language as this list records it. But rarity in the dictionary is not rarity in life. Eighteen of the 121 are everyday words in this site's common set (the 9,420 words that carry meanings on this site; see How We Verify), words nobody finds exotic: BY, WHY, TRY, DRY, FLY, SKY, CRY, FRY, SPY, SHY, GYM, MYTH, SYNC, LYNCH, RHYTHM and their plurals. You have probably used three of them today. The exotic reputation belongs to the hard core of twenty, and even there, HM, MM, SH and TSK are sounds every English speaker makes weekly.
The Y statistics make the same point from the other side. Of the 121, eighty-two lean on Y exactly once, eighteen lean on it twice (GYPSY and FLYBYS among them), and exactly one word in the entire list leans on it three times: SYZYGY. A spelling system that can run a six-letter word on three copies of its stand-in vowel is not short of vowels. It is short of vowel letters, which is a much smaller and more interesting problem, and the whole of this page is its size.
Questions
Is Y a vowel?
Sometimes, and this page is the evidence. Y is a consonant at the start of YES and a vowel in GYM, BY and RHYTHM, where it spells the vowel sound the word needs. Grammars that call it a semi-vowel are describing exactly that double life. For word games the working rule is simpler: a word with a Y can be played like a word with a vowel, and a word with no AEIOU and no Y is the rare object listed in the hard-core table above.
What is the longest word with no vowels?
In this word list, seven letters is the ceiling, reached by three words: RHYTHMS, GLYCYLS (a chemistry term) and TSKTSKS. Nothing of eight letters or more in the 172,823-word list manages without at least one of A, E, I, O or U. Longer claims circulate online, built on plurals of plurals or on dictionaries this list does not use; inside one named list, the answer is checkable, and here it is seven.
Is CRWTH really an English word?
It is a Welsh word that English took in, the way it took in CWM from the same language. It names a real instrument, a bowed lyre-like box that Welsh musicians played for centuries, and it appears in English dictionaries because English writers about Wales and music needed it. In Welsh spelling, W is a vowel, which is why CRWTH has a vowel sound (it rhymes roughly with 'truth' said firmly) while having no vowel letter an English eye recognises.
Do any of these words lack a vowel sound as well?
None of the real ones. Every spoken English word needs a vowel sound at its heart; that is close to a definition of a syllable. What the words on this page lack is a vowel letter from the AEIOU set. The vowel sound is still there, spelled with Y (RHYTHM), with W in the Welsh borrowings (CWM, pronounced 'koom'), or carried by the consonants themselves in the written sounds (TSK, PSST, HMM), which are noises first and spellings second.
Sources
- ENABLE word list (public domain): both lists are the complete result of scanning all 172,823 words for the absence of A, E, I, O and U (and then of Y): github.com/brokensandals/wordlists
- Princeton WordNet, for the meanings it carries (CWM, NTH, SYZYGY checked against it directly): wordnet.princeton.edu. The remaining meanings are short standard dictionary senses.
- The full checking method is on How We Verify. Lists computed 28 October 2026.
Update log
28 October 2026: published, with both lists computed from the shipped word files so the page and the tools cannot drift apart.