Which to use
“plein” is an adjective and “plon” is a noun - they look or sound alike but fill different roles in a sentence.
- #468
- “plein” frequency rank
- #31,186
- “plon” frequency rank
- 31654
- confusion score
Side-by-Side Comparison
| Feature | plein | plon |
|---|---|---|
| Definition | Qui contient tout ce qu’il est capable de contenir ; il est opposé à vide. | Nom, sur les côtes du Morbihan, d'un poisson de mer. |
Where the eye mixes plein and plon
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between plein and plon
These two trip readers on the page rather than in the ear: plein is \plɛ̃\ while plon is \plɔ̃\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 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 31654, derived from the frequency rank of both members and their visual similarity.
plein is recorded at frequency rank #468, classified as anadj, pronounced \plɛ̃\. plon is at rank #31,186, tagged as anoun, pronounced \plɔ̃\.
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 31654, this pair ranks #302,437 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of plein vs plon
Shared letters: lnp. Private to "plein": ei. Private to "plon": o.
"plein" · 5 letters · shape CCVVC · "plon" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "plein" for "plon" ever safe?
Frequency check: "plein" vs "plon" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "plein" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "plon" - compare definitions side by side with the headword page. Word entry
- This pair ranks #302,437 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "plein" and "plon" also get mixed up with nearby pairs, the highest-scored neighbour is "pio vs plon". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #302,437 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.