Which to use
“CDI” is a noun and “CH” is a symbol - they look or sound alike but fill different roles in a sentence.
- #6,686
- “CDI” frequency rank
- #3,389
- “CH” frequency rank
- 10075
- confusion score
Side-by-Side Comparison
| Feature | CDI | CH |
|---|---|---|
| Definition | Contrat à durée indéterminée, type de contrat de travail en France. | Signe distinctif en trafic international des véhicules automobiles immatriculés en Suisse, prescrit dans le cadre de la Convention sur la circulation routière de Genève de 1949 et de la Convention sur la signalisation routière de Vienne de 1968. |
Where the eye mixes CDI and CH
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: CDI vs CH
These two trip readers on the page rather than in the ear: CDI is \se.de.i\ while CH is voir ces lettres. En français, cela donne. 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 symbol), which is usually the fastest check. Our composite confusion score for this pair is 10075, derived from the frequency rank of both members and their visual similarity.
CDI is recorded at frequency rank #6,686, classified as anoun, pronounced \se.de.i\. CH is at rank #3,389, tagged as asymbol, pronounced voir ces lettres. En français, cela donne.
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 10075, this pair ranks #414,311 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of CDI vs CH
Shared letters: c. Private to "CDI": di. Private to "CH": h.
"CDI" · 3 letters · shape CCV · "CH" · 2 letters · shape CC
Frequently Asked Questions
Can "CDI" and "CH" be used interchangeably?
In ordinary French text, does "CDI" or "CH" show up more?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "CDI" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "CH" - compare definitions side by side with the headword page. Word entry
- This pair ranks #414,311 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "CDI" and "CH" also get mixed up with nearby pairs, the highest-scored neighbour is "CCE vs CDI". Nearby pair
Confusion rank #414,311 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.