Which to use
“sil” is a noun and “su” is a verb - they look or sound alike but fill different roles in a sentence.
- #20,575
- “sil” frequency rank
- #1,609
- “su” frequency rank
- 22184
- confusion score
Side-by-Side Comparison
| Feature | sil | su |
|---|---|---|
| Definition | Argile, variété d’ocre, dont les Anciens faisaient des poteries rouges ou jaunes. | Participe passé masculin singulier du verbe savoir. |
Where the eye mixes sil and su
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses sil with su
These two trip readers on the page rather than in the ear: sil is \sil\ while su is \sy\. 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 (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 22184, derived from the frequency rank of both members and their visual similarity.
sil is recorded at frequency rank #20,575, classified as anoun, pronounced \sil\. su is at rank #1,609, tagged as averb, pronounced \sy\.
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 22184, this pair ranks #359,410 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of sil vs su
Shared letters: s. Private to "sil": il. Private to "su": u.
"sil" · 3 letters · shape CVC · "su" · 2 letters · shape CV
Frequently Asked Questions
Do "sil" and "su" mean the same thing in a sentence?
In ordinary French text, does "sil" or "su" show up more?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "sil" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "su" - compare definitions side by side with the headword page. Word entry
- This pair ranks #359,410 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "sil" and "su" also get mixed up with nearby pairs, the highest-scored neighbour is "sil vs suu". Nearby pair
Confusion rank #359,410 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.