Which to use
“CDI” and “CFF” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #6,686
- “CDI” frequency rank
- #46,639
- “CFF” frequency rank
- 53325
- confusion score
Side-by-Side Comparison
| Feature | CDI | CFF |
|---|---|---|
| Definition | Contrat à durée indéterminée, type de contrat de travail en France. | Société anonyme (détenue à 100 % par la Confédération suisse) exploitant les chemins de fer suisses. |
Where the eye mixes CDI and CFF
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses CDI with CFF
A purely visual mix-up. CDI (\se.de.i\) and CFF (\se.ɛf.ɛf\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 53325, 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\. CFF is at rank #46,639, tagged as anoun, pronounced \se.ɛf.ɛf\.
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 53325, this pair ranks #141,504 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of CDI vs CFF
Shared letters: c. Private to "CDI": di. Private to "CFF": f.
"CDI" · 3 letters · shape CCV · "CFF" · 3 letters · shape CCC
Frequently Asked Questions
Do "CDI" and "CFF" mean the same thing in a sentence?
Frequency check: "CDI" vs "CFF" - which ranks higher?
What to do next
Eye-level mix-up between "CDI" and "CFF" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "CDI" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "CFF" - compare definitions side by side with the headword page. Word entry
- This pair ranks #141,504 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "CDI" and "CFF" also get mixed up with nearby pairs, the highest-scored neighbour is "CCE vs CFF". Nearby pair
Confusion rank #141,504 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.