Which to use
“réfraction” and “rétroaction” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #39,522
- “réfraction” frequency rank
- #44,168
- “rétroaction” frequency rank
- 83690
- confusion score
Side-by-Side Comparison
| Feature | réfraction | rétroaction |
|---|---|---|
| Definition | Déviation que subit un rayon lumineux, lorsqu’il passe d'un milieu dans un milieu de densité différente. | Action en retour d'un effet sur sa cause (ou sur l'un de ses facteurs causals). |
Where the eye mixes réfraction and rétroaction
Muted = shared; highlighted = the visual trap. They share 9 letters in sequence.
Look-alike desk: réfraction vs rétroaction
A purely visual mix-up. réfraction (\ʁe.fʁak.sjɔ̃\) and rétroaction (\ʁe.tʁo.ak.sjɔ̃\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 83690, derived from the frequency rank of both members and their visual similarity.
réfraction is recorded at frequency rank #39,522, classified as anoun, pronounced \ʁe.fʁak.sjɔ̃\. rétroaction is at rank #44,168, tagged as anoun, pronounced \ʁe.tʁo.ak.sjɔ̃\.
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 83690, this pair ranks #14,365 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of réfraction vs rétroaction
Shared letters: acinorté. Private to "réfraction": f. Private to "rétroaction": -.
"réfraction" · 10 letters · shape CVCCVCCVVC · "rétroaction" · 11 letters · shape CVCCVVCCVVC
Frequently Asked Questions
Do "réfraction" and "rétroaction" mean the same thing in a sentence?
Frequency check: "réfraction" vs "rétroaction" - which ranks higher?
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 "réfraction" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "rétroaction" - compare definitions side by side with the headword page. Word entry
- This pair ranks #14,365 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "réfraction" and "rétroaction" also get mixed up with nearby pairs, the highest-scored neighbour is "rétroaction vs rétroactive". Nearby pair
Confusion rank #14,365 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.