Which to use
“Kei” is a name and “ku” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #29,712
- “Kei” frequency rank
- #29,714
- “ku” frequency rank
- 59426
- confusion score
Side-by-Side Comparison
| Feature | Kei | ku |
|---|---|---|
| Definition | Hipocorístico de Keila. | Ese, esa. Pronombre y adjetivo demostrativo usado para una entidad ausente. |
Where the eye mixes Kei and ku
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. Kei runs 3 letters (CVV) against ku's 2 (CV) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: Kei vs ku
These two trip readers on the page rather than in the ear: Kei is [ˈkej] while ku is [ˈku]. 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 pronoun), which is usually the fastest check. Our composite confusion score for this pair is 59426, derived from the frequency rank of both members and their visual similarity.
Kei is recorded at frequency rank #29,712, classified as aname, pronounced [ˈkej]. ku is at rank #29,714, tagged as apron, pronounced [ˈku].
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 59426, this pair ranks #62,660 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of Kei vs ku
Shared letters: k. Private to "Kei": ei. Private to "ku": u.
"Kei" · 3 letters · shape CVV · "ku" · 2 letters · shape CV
Frequently Asked Questions
Is swapping "Kei" for "ku" ever safe?
Frequency check: "Kei" vs "ku" - which ranks higher?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "Kei" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ku" - compare definitions side by side with the headword page. Word entry
- This pair ranks #62,660 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "Kei" and "ku" also get mixed up with nearby pairs, the highest-scored neighbour is "keen vs Kei". Nearby pair
Confusion rank #62,660 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.