Which to use
“Radar” and “radon” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #7,888
- “Radar” frequency rank
- #44,667
- “radon” frequency rank
- 52555
- confusion score
Side-by-Side Comparison
| Feature | Radar | radon |
|---|---|---|
| Definition | Radar. | Élément chimique de numéro atomique 86 et de symbole Rn qui fait partie de la série chimique des gaz rares. |
Where the eye mixes Radar and radon
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses Radar with radon
A purely visual mix-up. Radar (\raˈdaːɐ\) and radon (\ʁa.dɔ̃\) 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 52555, derived from the frequency rank of both members and their visual similarity.
Radar is recorded at frequency rank #7,888, classified as anoun, pronounced \raˈdaːɐ\. radon is at rank #44,667, tagged as anoun, pronounced \ʁa.dɔ̃\.
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 52555, this pair ranks #146,927 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of Radar vs radon
Shared letters: adr. Private to "Radar": -. Private to "radon": no.
"Radar" · 5 letters · shape CVCVC · "radon" · 5 letters · shape CVCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "Radar" for "radon" ever safe?
Which is more common, "Radar" or "radon"?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "Radar" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "radon" - compare definitions side by side with the headword page. Word entry
- This pair ranks #146,927 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "Radar" and "radon" 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 #146,927 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.