Which to use
“radioactive” is an adjective and “radioactivité” is a noun - they look or sound alike but fill different roles in a sentence.
- #29,931
- “radioactive” frequency rank
- #20,543
- “radioactivité” frequency rank
- 50474
- confusion score
Side-by-Side Comparison
| Feature | radioactive | radioactivité |
|---|---|---|
| Definition | Féminin singulier de radioactif. | Propriété des corps qui se désintègrent spontanément, comme le radium, en dégageant de l’énergie sous forme de radiations diverses. |
Where the spellings diverge
Shared letters are muted; the letters that actually set radioactive and radioactivité apart are highlighted. They share 10 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: radioactive is \ʁa.djo.ak.tiv\ while radioactivité is \ʁa.djo.ak.ti.vi.te\. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 50474, derived from the frequency rank of both members and their visual similarity.
radioactive is recorded at frequency rank #29,931, classified as anadj, pronounced \ʁa.djo.ak.tiv\. radioactivité is at rank #20,543, tagged as anoun, pronounced \ʁa.djo.ak.ti.vi.te\.
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 50474, this pair ranks #162,339 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of radioactive vs radioactivité
Shared letters: acdiortv. Private to "radioactive": e. Private to "radioactivité": é.
"radioactive" · 11 letters · shape CVCVVVCCVCV · "radioactivité" · 13 letters · shape CVCVVVCCVCVCV
Known mistypes of this pair
- radioactive ← ardioactive · raddioactive · radiaoctive · radioacctive · radioacitve · radioactiev · radioactivve · radioacttive
Frequency comparison
Frequently Asked Questions
Can "radioactive" and "radioactivité" be used interchangeably?
Which is more common, "radioactive" or "radioactivité"?
Remembering radioactive vs radioactivité
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “radioactive”; for a noun, it's “radioactivité”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “radioactive” entry
- Browse more pairs most likely to be confused. Most confusable