Which to use
“altérer” is a verb and “alterne” is an adjective - they look or sound alike but fill different roles in a sentence.
- #22,157
- “altérer” frequency rank
- #24,852
- “alterne” frequency rank
- 47009
- confusion score
Side-by-Side Comparison
| Feature | altérer | alterne |
|---|---|---|
| Definition | Modifier dans sa nature, dans sa structure, un corps. | Désigne les angles formés par deux droites parallèles, avec les côtés opposés d’une même sécante. |
Where the eye mixes altérer and alterne
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.
Look-alike desk: altérer vs alterne
These two trip readers on the page rather than in the ear: altérer is \al.te.ʁe\ while alterne is \al.tɛʁn\. 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 (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 47009, 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\. alterne is at rank #24,852, tagged as anadj, pronounced \al.tɛʁn\.
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 47009, this pair ranks #190,362 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of altérer vs alterne
Shared letters: aelrt. Private to "altérer": é. Private to "alterne": n.
"altérer" · 7 letters · shape VCCVCVC · "alterne" · 7 letters · shape VCCVCCV
Known mistypes of this pair
- alterne ← aletrne · allterne · altenre · alteren · alternne · alterrne · altrene · altterne
Frequently Asked Questions
Is swapping "altérer" for "alterne" ever safe?
Frequency check: "altérer" vs "alterne" - which ranks higher?
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 "altérer" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "alterne" - compare definitions side by side with the headword page. Word entry
- This pair ranks #190,362 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "altérer" and "alterne" also get mixed up with nearby pairs, the highest-scored neighbour is "aliéné vs alterne". 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 #190,362 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.