Which to use
“FDJ” and “FSB” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #26,367
- “FDJ” frequency rank
- #45,626
- “FSB” frequency rank
- 71993
- confusion score
Side-by-Side Comparison
| Feature | FDJ | FSB |
|---|---|---|
| Definition | Société française qui commercialise des jeux de hasard et est en partie contrôlée par l’État français. | Service de renseignement de la Russie chargé des affaires de sécurité intérieure, successeur du service de la sécurité intérieure du KGB. |
Where the eye mixes FDJ and FSB
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: FDJ vs FSB
A purely visual mix-up. FDJ (\ɛf.de.ʒi\) and FSB (\ɛf.ɛs.be\) 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 71993, derived from the frequency rank of both members and their visual similarity.
FDJ is recorded at frequency rank #26,367, classified as aname, pronounced \ɛf.de.ʒi\. FSB is at rank #45,626, tagged as aname, pronounced \ɛf.ɛs.be\.
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 71993, this pair ranks #45,575 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of FDJ vs FSB
Shared letters: f. Private to "FDJ": dj. Private to "FSB": bs.
"FDJ" · 3 letters · shape CCC · "FSB" · 3 letters · shape CCC
Frequently Asked Questions
Is swapping "FDJ" for "FSB" ever safe?
In ordinary French text, does "FDJ" or "FSB" show up more?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "FDJ" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "FSB" - compare definitions side by side with the headword page. Word entry
- This pair ranks #45,575 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "FDJ" and "FSB" also get mixed up with nearby pairs, the highest-scored neighbour is "Fee vs FSB". Nearby pair
Confusion rank #45,575 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.