Which to use
“circa” is a preposition and “circle” is a noun - they look or sound alike but fill different roles in a sentence.
- #13,480
- “circa” frequency rank
- #2,720
- “circle” frequency rank
- 16200
- confusion score
Side-by-Side Comparison
| Feature | circa | circle |
|---|---|---|
| Definition | Approximately, about, around (typically in relation to time) | A two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from a given point (center). |
Where the eye mixes circa and circle
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Why the eye confuses circa with circle
These two trip readers on the page rather than in the ear: circa is /ˈsɜːkə/ while circle is /ˈsɜɹkəl/. 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 (preposition vs noun), which is usually the fastest check. Our composite confusion score for this pair is 16200, derived from the frequency rank of both members and their visual similarity.
circa is recorded at frequency rank #13,480, classified as aprep, pronounced /ˈsɜːkə/. circle is at rank #2,720, tagged as anoun, pronounced /ˈsɜɹkəl/.
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 16200, this pair ranks #459,253 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of circa vs circle
Shared letters: cir. Private to "circa": a. Private to "circle": el.
"circa" · 5 letters · shape CVCCV · "circle" · 6 letters · shape CVCCCV
Known mistypes of this pair
Frequently Asked Questions
Can "circa" and "circle" be used interchangeably?
In ordinary English text, does "circa" or "circle" show up more?
After this comparison
Eye-level mix-up between "circa" and "circle" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "circa" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "circle" - compare definitions side by side with the headword page. Word entry
- This pair ranks #459,253 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "circa" and "circle" also get mixed up with nearby pairs, the highest-scored neighbour is "circa vs curia". 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 #459,253 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.