Which to use
“sly” is an adjective and “sul” is an article - they look or sound alike but fill different roles in a sentence.
- #47,613
- “sly” frequency rank
- #33,033
- “sul” frequency rank
- 80646
- confusion score
Side-by-Side Comparison
| Feature | sly | sul |
|---|---|---|
| Definition | Matois, malin. | Sur le. |
Where the eye mixes sly and sul
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. sly (CCV) and sul (CVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Visual trap between sly and sul
These two trip readers on the page rather than in the ear: sly is \ˈslaɪ\ while sul is \ˈsul\. 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 (adjective vs article), which is usually the fastest check. Our composite confusion score for this pair is 80646, derived from the frequency rank of both members and their visual similarity.
sly is recorded at frequency rank #47,613, classified as anadj, pronounced \ˈslaɪ\. sul is at rank #33,033, tagged as anarticle, pronounced \ˈsul\.
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 80646, this pair ranks #20,475 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of sly vs sul
Shared letters: ls. Private to "sly": y. Private to "sul": u.
"sly" · 3 letters · shape CCV · "sul" · 3 letters · shape CVC
Frequently Asked Questions
Do "sly" and "sul" mean the same thing in a sentence?
Frequency check: "sly" vs "sul" - which ranks higher?
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 "sly" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sul" - compare definitions side by side with the headword page. Word entry
- This pair ranks #20,475 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "sly" and "sul" also get mixed up with nearby pairs, the highest-scored neighbour is "sly vs suu". Nearby pair
Confusion rank #20,475 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.