Which to use
“circa” is a preposition and “cisco” is a noun - they look or sound alike but fill different roles in a sentence.
- #13,480
- “circa” frequency rank
- #15,128
- “cisco” frequency rank
- 28608
- confusion score
Side-by-Side Comparison
| Feature | circa | cisco |
|---|---|---|
| Definition | Approximately, about, around (typically in relation to time) | Any North American freshwater fish of certain species of the genus Coregonus that live in cold-water lakes. |
Where the eye mixes circa and cisco
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Look-alike desk: circa vs cisco
These two trip readers on the page rather than in the ear: circa is /ˈsɜːkə/ while cisco is /ˈsɪskəʊ/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (preposition vs noun), which is usually the fastest check. Our composite confusion score for this pair is 28608, 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/. cisco is at rank #15,128, tagged as anoun, pronounced /ˈsɪskəʊ/.
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 28608, this pair ranks #369,717 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of circa vs cisco
Shared letters: ci. Private to "circa": ar. Private to "cisco": os.
"circa" · 5 letters · shape CVCCV · "cisco" · 5 letters · shape CVCCV
Known mistypes of this pair
Frequently Asked Questions
Do "circa" and "cisco" mean the same thing in a sentence?
Frequency check: "circa" vs "cisco" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "circa" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "cisco" - compare definitions side by side with the headword page. Word entry
- This pair ranks #369,717 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "circa" and "cisco" 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 #369,717 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.