Which to use
“acre” and “arc” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #7,877
- “acre” frequency rank
- #5,005
- “arc” frequency rank
- 12882
- confusion score
Side-by-Side Comparison
| Feature | acre | arc |
|---|---|---|
| Definition | 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. | That part of a circle which a heavenly body appears to pass through as it moves above and below the horizon. |
Where the eye mixes acre and arc
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses acre with arc
A purely visual mix-up. acre (/ˈeɪ.kə/) and arc (/ɑːk/) 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 12882, derived from the frequency rank of both members and their visual similarity.
acre is recorded at frequency rank #7,877, classified as anoun, pronounced /ˈeɪ.kə/. arc is at rank #5,005, tagged as anoun, pronounced /ɑːk/.
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 12882, this pair ranks #479,012 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of acre vs arc
Shared letters: acr. Private to "acre": e. Private to "arc": -.
"acre" · 4 letters · shape VCCV · "arc" · 3 letters · shape VCC
Known mistypes of this pair
- acre ← accre · acrre
Frequently Asked Questions
Can "acre" and "arc" be used interchangeably?
Frequency check: "acre" vs "arc" - which ranks higher?
After this comparison
Eye-level mix-up between "acre" and "arc" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "acre" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "arc" - compare definitions side by side with the headword page. Word entry
- This pair ranks #479,012 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "acre" and "arc" also get mixed up with nearby pairs, the highest-scored neighbour is "amb vs arc". 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 #479,012 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.