Which to use
“ko” is a noun and “Koo” is a name - they look or sound alike but fill different roles in a sentence.
- #10,717
- “ko” frequency rank
- #30,114
- “Koo” frequency rank
- 40831
- confusion score
Side-by-Side Comparison
| Feature | ko | Koo |
|---|---|---|
| Definition | A local shape to which the ko rule applies; a ko shape. | A surname from Cantonese. |
Letter map: ko vs Koo
Shared letters muted; letters that set ko and Koo apart highlighted. Shared run: 2.
Role in the sentence - ko and Koo
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ko is anoun and Kooaname. On the page they differ by 1 extra letter(s) - “ko” sits inside “Koo”. Our composite confusion score for this pair is 40831, derived from the frequency rank of both members and their visual similarity.
ko is recorded at frequency rank #10,717, classified as anoun, pronounced /ˈkəʊ/. Koo is at rank #30,114, tagged as aname.
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 40831, this pair ranks #264,000 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of ko vs Koo
Shared letters: ko. Private to "ko": -. Private to "Koo": -.
"ko" · 2 letters · shape CV · "Koo" · 3 letters · shape CVV
Frequently Asked Questions
Is swapping "ko" for "Koo" ever safe?
Which is more common, "ko" or "Koo"?
What to do next
Pair "ko" vs "Koo" is on the table, pick a follow-up below.
- Full dictionary entry for "ko" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "Koo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #264,000 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "ko" and "Koo" also get mixed up with nearby pairs, the highest-scored neighbour is "Koo vs Kop". Nearby pair
Confusion rank #264,000 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.