Which to use
“radon” and “rayon” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #33,384
- “radon” frequency rank
- #29,431
- “rayon” frequency rank
- 62815
- confusion score
Side-by-Side Comparison
| Feature | radon | rayon |
|---|---|---|
| Definition | The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas. | A manufactured regenerated cellulosic fiber. |
Where the eye mixes radon and rayon
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. radon (CVCVC) and rayon (CVVVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Why the eye confuses radon with rayon
A purely visual mix-up. radon (/ˈɹeɪdɒn/) and rayon (/ˈɹeɪɒn/) 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 a single letter - d in “radon” becomes y in “rayon”. Our composite confusion score for this pair is 62815, derived from the frequency rank of both members and their visual similarity.
radon is recorded at frequency rank #33,384, classified as anoun, pronounced /ˈɹeɪdɒn/. rayon is at rank #29,431, tagged as anoun, pronounced /ˈɹeɪɒn/.
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 62815, this pair ranks #86,375 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of radon vs rayon
Shared letters: anor. Private to "radon": d. Private to "rayon": y.
"radon" · 5 letters · shape CVCVC · "rayon" · 5 letters · shape CVVVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "radon" for "rayon" ever safe?
In ordinary English text, does "radon" or "rayon" 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 "rayon" - compare definitions side by side with the headword page. Word entry
- This pair ranks #86,375 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "radon" and "rayon" also get mixed up with nearby pairs, the highest-scored neighbour is "radon vs ripon". 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 #86,375 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.