Which to use
“rein” and “rey” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #10,931
- “rein” frequency rank
- #12,468
- “rey” frequency rank
- 23399
- confusion score
Side-by-Side Comparison
| Feature | rein | rey |
|---|---|---|
| Definition | Organe pair, situé dans l’abdomen, en arrière du péritoine, au niveau de la douzième paire de côtes (flottantes), qui assure, par filtration et excrétion d’urine, l’élimination des toxiques et l’équilibre hydroélectrolytique du sang et de l’organisme en général. | Roi. |
Where the eye mixes rein and rey
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses rein with rey
A purely visual mix-up. rein (\ʁɛ̃\) and rey (\rej\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 23399, derived from the frequency rank of both members and their visual similarity.
rein is recorded at frequency rank #10,931, classified as anoun, pronounced \ʁɛ̃\. rey is at rank #12,468, tagged as anoun, pronounced \rej\.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 23399, this pair ranks #352,721 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of rein vs rey
Shared letters: er. Private to "rein": in. Private to "rey": y.
"rein" · 4 letters · shape CVVC · "rey" · 3 letters · shape CVV
Known mistypes of this pair
- rein ← erin · reinn · reni · rrein
Frequently Asked Questions
Can "rein" and "rey" be used interchangeably?
Frequency check: "rein" vs "rey" - which ranks higher?
After this comparison
Eye-level mix-up between "rein" and "rey" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "rein" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "rey" - compare definitions side by side with the headword page. Word entry
- This pair ranks #352,721 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "rein" and "rey" also get mixed up with nearby pairs, the highest-scored neighbour is "rey vs roya". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #352,721 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.