Which to use
“Aar” is a name and “acre” is a noun - they look or sound alike but fill different roles in a sentence.
- #45,768
- “Aar” frequency rank
- #7,877
- “acre” frequency rank
- 53645
- confusion score
Side-by-Side Comparison
| Feature | Aar | acre |
|---|---|---|
| Definition | A river in Switzerland, flowing 292 km from the glaciers of the Bernese Alps into the Rhine at Koblenz, on the Swiss–German border. | An English unit of land area (symbol: a. or ac.) originally denoting a day's ploughing for a yoke of oxen, now standardized as 4,840 square yards or 4,046.86 square metres. |
Where the eye mixes Aar and acre
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. Aar runs 3 letters (VVC) against acre's 4 (VCCV) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between Aar and acre
These two trip readers on the page rather than in the ear: Aar is /ɑɹ/ while acre is /ˈeɪ.kə/. 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 (name vs noun), which is usually the fastest check. Our composite confusion score for this pair is 53645, derived from the frequency rank of both members and their visual similarity.
Aar is recorded at frequency rank #45,768, classified as aname, pronounced /ɑɹ/. acre is at rank #7,877, tagged as anoun, pronounced /ˈeɪ.kə/.
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 53645, this pair ranks #147,360 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of Aar vs acre
Shared letters: ar. Private to "Aar": -. Private to "acre": ce.
"Aar" · 3 letters · shape VVC · "acre" · 4 letters · shape VCCV
Known mistypes of this pair
- acre ← accre · acrre
Frequently Asked Questions
Is swapping "Aar" for "acre" ever safe?
Which is more common, "Aar" or "acre"?
After this comparison
Eye-level mix-up between "Aar" and "acre" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "Aar" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "acre" - compare definitions side by side with the headword page. Word entry
- This pair ranks #147,360 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "Aar" and "acre" also get mixed up with nearby pairs, the highest-scored neighbour is "Aar vs amb". 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 #147,360 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.