Which to use
“CFF” and “CPI” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #46,639
- “CFF” frequency rank
- #20,409
- “CPI” frequency rank
- 67048
- confusion score
Side-by-Side Comparison
| Feature | CFF | CPI |
|---|---|---|
| Definition | Société anonyme (détenue à 100 % par la Confédération suisse) exploitant les chemins de fer suisses. | Synonyme de Cour pénale internationale. |
Where the eye mixes CFF and CPI
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. CFF (CCC) and CPI (CCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Why the eye confuses CFF with CPI
A purely visual mix-up. CFF (\se.ɛf.ɛf\) and CPI (\se.pe.i\) 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 67048, derived from the frequency rank of both members and their visual similarity.
CFF is recorded at frequency rank #46,639, classified as anoun, pronounced \se.ɛf.ɛf\. CPI is at rank #20,409, tagged as anoun, pronounced \se.pe.i\.
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 67048, this pair ranks #65,133 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of CFF vs CPI
Shared letters: c. Private to "CFF": f. Private to "CPI": ip.
"CFF" · 3 letters · shape CCC · "CPI" · 3 letters · shape CCV
Frequently Asked Questions
Can "CFF" and "CPI" be used interchangeably?
Which is more common, "CFF" or "CPI"?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "CFF" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "CPI" - compare definitions side by side with the headword page. Word entry
- This pair ranks #65,133 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "CFF" and "CPI" also get mixed up with nearby pairs, the highest-scored neighbour is "CCE vs CFF". Nearby pair
Confusion rank #65,133 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.