Which to use
“sai” is a noun and “suu” is an adjective - they look or sound alike but fill different roles in a sentence.
- #26,527
- “sai” frequency rank
- #49,960
- “suu” frequency rank
- 76487
- confusion score
Side-by-Side Comparison
| Feature | sai | suu |
|---|---|---|
| Definition | Saï (arme japonaise). | Son. |
Where the eye mixes sai and suu
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between sai and suu
These two trip readers on the page rather than in the ear: sai is \ˈsaɪ\ while suu is \ˈsuː\. 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 (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 76487, derived from the frequency rank of both members and their visual similarity.
sai is recorded at frequency rank #26,527, classified as anoun, pronounced \ˈsaɪ\. suu is at rank #49,960, tagged as anadj, pronounced \ˈsuː\.
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 76487, this pair ranks #31,009 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of sai vs suu
Shared letters: s. Private to "sai": ai. Private to "suu": u.
"sai" · 3 letters · shape CVV · "suu" · 3 letters · shape CVV
Frequently Asked Questions
Can "sai" and "suu" be used interchangeably?
In ordinary French text, does "sai" or "suu" show up more?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "sai" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "suu" - compare definitions side by side with the headword page. Word entry
- This pair ranks #31,009 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "sai" and "suu" also get mixed up with nearby pairs, the highest-scored neighbour is "SSR vs suu". Nearby pair
Confusion rank #31,009 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.