Kai vs ku, What's the Difference?

Which to use

“Kai” is a noun and “ku” is a pronoun - they look or sound alike but fill different roles in a sentence.

#5,859
“Kai” frequency rank: #17,061
“ku” frequency rank: 22920
confusion score

Side-by-Side Comparison

Feature	Kai	ku
Definition	befestigtes Ufer in einem Hafen als Schiffsanlegeplatz	wo

Letter map: Kai vs ku

Shared letters muted; letters that set Kai and ku apart highlighted. Shared run: 1.

3 ch

Kai

2 ch

Role in the sentence - Kai and ku

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: Kai is anoun and kuapronoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 22920, derived from the frequency rank of both members and their visual similarity.

Kai is recorded at frequency rank #5,859, classified as anoun, pronounced [kaɪ̯]. ku is at rank #17,061, tagged as apron, pronounced […].

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 22920, this pair ranks #1,868,022 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of Kai vs ku

Shared letters: k. Private to "Kai": ai. Private to "ku": u.

"Kai" · 3 letters · shape CVV · "ku" · 2 letters · shape CV

Frequently Asked Questions

Can "Kai" and "ku" be used interchangeably?

No - they are not even the same part of speech. "Kai" is a noun and "ku" a pronoun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "Kai" or "ku"?

"Kai" is the more common of the two: it sits at frequency rank #5,859 in our German list, against #17,061 for "ku". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

You've compared "Kai" and "ku". Here's where to go from here.

Full dictionary entry for "Kai" 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 #1,868,022 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
"Kai" and "ku" also get mixed up with nearby pairs, the highest-scored neighbour is "ku vs puzzles". Nearby pair

Confusion rank #1,868,022 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.