Which to use
“radioactif” and “radioactive” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #26,498
- “radioactif” frequency rank
- #29,931
- “radioactive” frequency rank
- 56429
- confusion score
Side-by-Side Comparison
| Feature | radioactif | radioactive |
|---|---|---|
| Definition | Qui est doué de radioactivité. | Féminin singulier de radioactif. |
Where the spellings diverge
Shared letters are muted; the letters that actually set radioactif and radioactive apart are highlighted. They share 9 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
A purely visual mix-up. radioactif (\ʁa.djo.ak.tif\) and radioactive (\ʁa.djo.ak.tiv\) 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 56429, derived from the frequency rank of both members and their visual similarity.
radioactif is recorded at frequency rank #26,498, classified as anadj, pronounced \ʁa.djo.ak.tif\. radioactive is at rank #29,931, tagged as anadj, pronounced \ʁa.djo.ak.tiv\.
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 56429, this pair ranks #121,145 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of radioactif vs radioactive
Shared letters: acdiort. Private to "radioactif": f. Private to "radioactive": ev.
"radioactif" · 10 letters · shape CVCVVVCCVC · "radioactive" · 11 letters · shape CVCVVVCCVCV
Known mistypes of this pair
- radioactif ← ardioactif · raddioactif · radiaoctif · radioacctif · radioacitf · radioactfi · radioactiff · radioacttif
- radioactive ← ardioactive · raddioactive · radiaoctive · radioacctive · radioacitve · radioactiev · radioactivve · radioacttive
Frequency comparison
Frequently Asked Questions
Can "radioactif" and "radioactive" be used interchangeably?
Which is more common, "radioactif" or "radioactive"?
Remembering radioactif vs radioactive
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 “radioactif” entry
- Browse more pairs most likely to be confused. Most confusable