Which to use
“plongée” is a noun and “prolongée” is an adjective - they look or sound alike but fill different roles in a sentence.
- #7,739
- “plongée” frequency rank
- #9,537
- “prolongée” frequency rank
- 17276
- confusion score
Side-by-Side Comparison
| Feature | plongée | prolongée |
|---|---|---|
| Definition | Action de plonger ; état de celui qui plonge. | Féminin singulier de prolongé. |
Where the eye mixes plongée and prolongée
Muted = shared; highlighted = the visual trap. They share 7 letters in sequence. plongée runs 7 letters (CCVCCVV) against prolongée's 9 (CCVCVCCVV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses plongée with prolongée
These two trip readers on the page rather than in the ear: plongée is \plɔ̃.ʒe\ while prolongée is \pʁɔ.lɔ̃.ʒe\. 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 (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 17276, derived from the frequency rank of both members and their visual similarity.
plongée is recorded at frequency rank #7,739, classified as anoun, pronounced \plɔ̃.ʒe\. prolongée is at rank #9,537, tagged as anadj, pronounced \pʁɔ.lɔ̃.ʒe\.
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 17276, this pair ranks #383,951 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of plongée vs prolongée
Shared letters: eglnopé. Private to "plongée": -. Private to "prolongée": r.
"plongée" · 7 letters · shape CCVCCVV · "prolongée" · 9 letters · shape CCVCVCCVV
Frequently Asked Questions
Can "plongée" and "prolongée" be used interchangeably?
Frequency check: "plongée" vs "prolongée" - which ranks higher?
Useful next steps
Eye-level mix-up between "plongée" and "prolongée" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "plongée" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "prolongée" - compare definitions side by side with the headword page. Word entry
- This pair ranks #383,951 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "plongée" and "prolongée" also get mixed up with nearby pairs, the highest-scored neighbour is "prolongée vs prolongera". Nearby pair
Confusion rank #383,951 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.