Which to use
“Tsu” and “Tsui” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #43,976
- “Tsu” frequency rank
- #46,827
- “Tsui” frequency rank
- 90803
- confusion score
Side-by-Side Comparison
| Feature | Tsu | Tsui |
|---|---|---|
| Definition | The capital city of Mie Prefecture, Japan. | A surname. |
Letter map: Tsu vs Tsui
Shared letters muted; letters that set Tsu and Tsui apart highlighted. Shared run: 3. Tsu runs 3 letters (CCV) against Tsui's 4 (CCVV) - the length gap alone is often enough to separate them once you know to check it.
Pair insight - Tsu / Tsui
Tsu and Tsui are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 extra letter(s) - “Tsu” sits inside “Tsui”. Our composite confusion score for this pair is 90803, derived from the frequency rank of both members and their visual similarity.
Tsu is recorded at frequency rank #43,976, classified as aname. Tsui is at rank #46,827, 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 90803, this pair ranks #3,853 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of Tsu vs Tsui
Shared letters: stu. Private to "Tsu": -. Private to "Tsui": i.
"Tsu" · 3 letters · shape CCV · "Tsui" · 4 letters · shape CCVV
Known mistypes of this pair
- Tsui ← stui · tsiu · tssui · ttsui · tusi
Frequently Asked Questions
Is swapping "Tsu" for "Tsui" ever safe?
Frequency check: "Tsu" vs "Tsui" - which ranks higher?
What to do next
You've compared "Tsu" and "Tsui". Here's where to go from here.
- Full dictionary entry for "Tsu" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "Tsui" - compare definitions side by side with the headword page. Word entry
- This pair ranks #3,853 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "Tsu" and "Tsui" also get mixed up with nearby pairs, the highest-scored neighbour is "TDI vs Tsui". 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 #3,853 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.