Which to use
“radon” and “raison” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #44,667
- “radon” frequency rank
- #259
- “raison” frequency rank
- 44926
- confusion score
Side-by-Side Comparison
| Feature | radon | raison |
|---|---|---|
| Definition | Élément chimique de numéro atomique 86 et de symbole Rn qui fait partie de la série chimique des gaz rares. | Faculté intellectuelle par laquelle l’homme connaît, juge et se conduit ; entendement. |
Where the eye mixes radon and raison
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Look-alike desk: radon vs raison
A purely visual mix-up. radon (\ʁa.dɔ̃\) and raison (\ʁɛ.zɔ̃\) 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 44926, derived from the frequency rank of both members and their visual similarity.
radon is recorded at frequency rank #44,667, classified as anoun, pronounced \ʁa.dɔ̃\. raison is at rank #259, tagged as anoun, pronounced \ʁɛ.zɔ̃\.
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 44926, this pair ranks #206,749 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of radon vs raison
Shared letters: anor. Private to "radon": d. Private to "raison": is.
"radon" · 5 letters · shape CVCVC · "raison" · 6 letters · shape CVVCVC
Known mistypes of this pair
Frequently Asked Questions
Do "radon" and "raison" mean the same thing in a sentence?
In ordinary French text, does "radon" or "raison" show up more?
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 "radon" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "raison" - compare definitions side by side with the headword page. Word entry
- This pair ranks #206,749 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "radon" and "raison" also get mixed up with nearby pairs, the highest-scored neighbour is "radon vs ramen". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #206,749 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.