Which to use
“défoncé” is an adjective and “démence” is a noun - they look or sound alike but fill different roles in a sentence.
- #13,773
- “défoncé” frequency rank
- #18,183
- “démence” frequency rank
- 31956
- confusion score
Side-by-Side Comparison
| Feature | défoncé | démence |
|---|---|---|
| Definition | Percé, troué, perforé. | Aliénation mentale chronique, acquise et évolutive, dont l'étiologie est diverse. |
Where the eye mixes défoncé and démence
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. défoncé and démence follow the identical consonant-vowel pattern (CVCVCCV). Same shape at a glance is often the real trap, independent of shared letters.
Look-alike desk: défoncé vs démence
These two trip readers on the page rather than in the ear: défoncé is \de.fɔ̃.se\ while démence is \de.mɑ̃s\. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 3 positions, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 31956, derived from the frequency rank of both members and their visual similarity.
défoncé is recorded at frequency rank #13,773, classified as anadj, pronounced \de.fɔ̃.se\. démence is at rank #18,183, tagged as anoun, pronounced \de.mɑ̃s\.
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 31956, this pair ranks #300,498 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of défoncé vs démence
Shared letters: cdné. Private to "défoncé": fo. Private to "démence": em.
"défoncé" · 7 letters · shape CVCVCCV · "démence" · 7 letters · shape CVCVCCV
Frequently Asked Questions
Is swapping "défoncé" for "démence" ever safe?
Which is more common, "défoncé" or "démence"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "défoncé" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "démence" - compare definitions side by side with the headword page. Word entry
- This pair ranks #300,498 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "défoncé" and "démence" also get mixed up with nearby pairs, the highest-scored neighbour is "démange vs démence". Nearby pair
Confusion rank #300,498 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.