Which to use
“rob” and “RSF” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #9,552
- “rob” frequency rank
- #44,703
- “RSF” frequency rank
- 54255
- confusion score
Side-by-Side Comparison
| Feature | rob | RSF |
|---|---|---|
| Definition | Suc épaissi et dépuré de plantes, de fruits cuits. | Abréviation de réacteur à sels fondus. |
Where the eye mixes rob and RSF
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between rob and RSF
A purely visual mix-up. rob (\ʁɔb\) and RSF (\ɛ.ʁɛ.sɛf\) 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 54255, derived from the frequency rank of both members and their visual similarity.
rob is recorded at frequency rank #9,552, classified as anoun, pronounced \ʁɔb\. RSF is at rank #44,703, tagged as anoun, pronounced \ɛ.ʁɛ.sɛf\.
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 54255, this pair ranks #135,245 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of rob vs RSF
Shared letters: r. Private to "rob": bo. Private to "RSF": fs.
"rob" · 3 letters · shape CVC · "RSF" · 3 letters · shape CCC
Frequently Asked Questions
Can "rob" and "RSF" be used interchangeably?
In ordinary French text, does "rob" or "RSF" show up more?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "rob" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "RSF" - compare definitions side by side with the headword page. Word entry
- This pair ranks #135,245 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "rob" and "RSF" also get mixed up with nearby pairs, the highest-scored neighbour is "rog vs RSF". Nearby pair
Confusion rank #135,245 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.