Which to use
“radon” and “rain” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #33,384
- “radon” frequency rank
- #2,012
- “rain” frequency rank
- 35396
- confusion score
Side-by-Side Comparison
| Feature | radon | rain |
|---|---|---|
| Definition | The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas. | Condensed water falling from a cloud. |
Where the spellings diverge
Shared letters are muted; the letters that actually set radon and rain apart are highlighted. They share 3 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
radon and rain form a confusable pair in the English index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by 1 letter(s) in length - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 35396, 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/. rain is at rank #2,012, tagged as anoun, pronounced /ˈɹeɪ̯n/.
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 35396, this pair ranks #312,355 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Frequency comparison
Frequently Asked Questions
Can "radon" and "rain" be used interchangeably?
Remembering radon vs rain
The fastest way to pick the right one every time.
- Read both glosses above and match the meaning you intend, only context separates this pair.
- See each word in full, definition, IPA, etymology and its other confusables. Full “radon” entry
- Browse more pairs most likely to be confused. Most confusable