Which to use
“altérer” and “alterner” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #22,157
- “altérer” frequency rank
- #30,458
- “alterner” frequency rank
- 52615
- confusion score
Side-by-Side Comparison
| Feature | altérer | alterner |
|---|---|---|
| Definition | Modifier dans sa nature, dans sa structure, un corps. | Faire successivement et tour à tour une même chose en parlant de deux personnes. |
Where the eye mixes altérer and alterner
Muted = shared; highlighted = the visual trap. They share 6 letters in sequence. altérer runs 7 letters (VCCVCVC) against alterner's 8 (VCCVCCVC) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses altérer with alterner
A purely visual mix-up. altérer (\al.te.ʁe\) and alterner (\al.tɛʁ.ne\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 52615, derived from the frequency rank of both members and their visual similarity.
altérer is recorded at frequency rank #22,157, classified as averb, pronounced \al.te.ʁe\. alterner is at rank #30,458, tagged as averb, pronounced \al.tɛʁ.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 52615, this pair ranks #146,463 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of altérer vs alterner
Shared letters: aelrt. Private to "altérer": é. Private to "alterner": n.
"altérer" · 7 letters · shape VCCVCVC · "alterner" · 8 letters · shape VCCVCCVC
Known mistypes of this pair
- alterner ← aletrner · allterner · altenrer · alterenr · alternerr · alternner · alternre · alterrner
Frequently Asked Questions
Is swapping "altérer" for "alterner" ever safe?
In ordinary French text, does "altérer" or "alterner" show up more?
After this comparison
Eye-level mix-up between "altérer" and "alterner" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "altérer" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "alterner" - compare definitions side by side with the headword page. Word entry
- This pair ranks #146,463 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "altérer" and "alterner" also get mixed up with nearby pairs, the highest-scored neighbour is "aliéner vs alterner". 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 #146,463 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.