Which to use
“additionnel” is an adjective and “additionner” is a verb - they look or sound alike but fill different roles in a sentence.
- #16,534
- “additionnel” frequency rank
- #40,583
- “additionner” frequency rank
- 57117
- confusion score
Side-by-Side Comparison
| Feature | additionnel | additionner |
|---|---|---|
| Definition | Qui est ajouté. | Ajouter plusieurs nombres l’un à l’autre pour en trouver le total. |
Where the eye mixes additionnel and additionner
Muted = shared; highlighted = the visual trap. They share 10 letters in sequence. additionnel and additionner follow the identical consonant-vowel pattern (VCCVCVVCCVC). Same shape at a glance is often the real trap, independent of shared letters.
Look-alike desk: additionnel vs additionner
These two trip readers on the page rather than in the ear: additionnel is \a.di.sjɔ.nɛl\ while additionner is \a.di.sjɔ.ne\. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - l in “additionnel” becomes r in “additionner”, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 57117, derived from the frequency rank of both members and their visual similarity.
additionnel is recorded at frequency rank #16,534, classified as anadj, pronounced \a.di.sjɔ.nɛl\. additionner is at rank #40,583, tagged as averb, pronounced \a.di.sjɔ.ne\.
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 57117, this pair ranks #116,953 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of additionnel vs additionner
Shared letters: adeinot. Private to "additionnel": l. Private to "additionner": r.
"additionnel" · 11 letters · shape VCCVCVVCCVC · "additionner" · 11 letters · shape VCCVCVVCCVC
Known mistypes of this pair
- additionnel ← addiitonnel · additinonel · additionel · additionenl · additionnell · additionnle · additoinnel · addittionnel
- additionner ← addiitonner · additinoner · additionenr · additioner · additionnerr · additionnre · additoinner · addittionner
Frequently Asked Questions
Is swapping "additionnel" for "additionner" ever safe?
In ordinary French text, does "additionnel" or "additionner" show up more?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "additionnel" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "additionner" - compare definitions side by side with the headword page. Word entry
- This pair ranks #116,953 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "additionnel" and "additionner" also get mixed up with nearby pairs, the highest-scored neighbour is "additionner vs auditionner". 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 #116,953 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.