Which to use
“aérer” and “altérer” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #31,836
- “aérer” frequency rank
- #22,157
- “altérer” frequency rank
- 53993
- confusion score
Side-by-Side Comparison
| Feature | aérer | altérer |
|---|---|---|
| Definition | Assainir en mettant en contact avec l’air. | Modifier dans sa nature, dans sa structure, un corps. |
Where the eye mixes aérer and altérer
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. aérer runs 5 letters (VVCVC) against altérer's 7 (VCCVCVC) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between aérer and altérer
A purely visual mix-up. aérer (\a.e.ʁe\) and altérer (\al.te.ʁe\) 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 2 letter(s) in length. Our composite confusion score for this pair is 53993, derived from the frequency rank of both members and their visual similarity.
aérer is recorded at frequency rank #31,836, classified as averb, pronounced \a.e.ʁe\. altérer is at rank #22,157, tagged as averb, pronounced \al.te.ʁe\.
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 53993, this pair ranks #137,019 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of aérer vs altérer
Shared letters: aeré. Private to "aérer": -. Private to "altérer": lt.
"aérer" · 5 letters · shape VVCVC · "altérer" · 7 letters · shape VCCVCVC
Frequently Asked Questions
Can "aérer" and "altérer" be used interchangeably?
Frequency check: "aérer" vs "altérer" - 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 "aérer" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "altérer" - compare definitions side by side with the headword page. Word entry
- This pair ranks #137,019 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "aérer" and "altérer" also get mixed up with nearby pairs, the highest-scored neighbour is "aérer vs Aure". Nearby pair
Confusion rank #137,019 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.