Which to use
“rachis” is a noun and “ravis” is an adjective - they look or sound alike but fill different roles in a sentence.
- #49,307
- “rachis” frequency rank
- #12,654
- “ravis” frequency rank
- 61961
- confusion score
Side-by-Side Comparison
| Feature | rachis | ravis |
|---|---|---|
| Definition | Empilement de 33 ou 34 vertèbres, qui forment le support du dos des vertébrés et sur certaines desquelles sont fixées les côtes. | Masculin pluriel de ravi. |
Where the eye mixes rachis and ravis
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. rachis runs 6 letters (CVCCVC) against ravis's 5 (CVCVC) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses rachis with ravis
These two trip readers on the page rather than in the ear: rachis is \ʁa.ʃis\ while ravis is \ʁa.vi\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 61961, derived from the frequency rank of both members and their visual similarity.
rachis is recorded at frequency rank #49,307, classified as anoun, pronounced \ʁa.ʃis\. ravis is at rank #12,654, tagged as anadj, pronounced \ʁa.vi\.
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 61961, this pair ranks #89,554 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of rachis vs ravis
Shared letters: airs. Private to "rachis": ch. Private to "ravis": v.
"rachis" · 6 letters · shape CVCCVC · "ravis" · 5 letters · shape CVCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "rachis" for "ravis" ever safe?
Frequency check: "rachis" vs "ravis" - which ranks higher?
Useful next steps
Eye-level mix-up between "rachis" and "ravis" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "rachis" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ravis" - compare definitions side by side with the headword page. Word entry
- This pair ranks #89,554 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "rachis" and "ravis" also get mixed up with nearby pairs, the highest-scored neighbour is "rachis vs rais". 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 #89,554 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.