Which to use
“duc” is a noun and “dy” is an adjective - they look or sound alike but fill different roles in a sentence.
- #2,118
- “duc” frequency rank
- #45,564
- “dy” frequency rank
- 47682
- confusion score
Side-by-Side Comparison
| Feature | duc | dy |
|---|---|---|
| Definition | Titre qui était le plus élevé parmi l’ancienne noblesse de France et de quelques autres États. | Deux. |
Where the eye mixes duc and dy
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses duc with dy
These two trip readers on the page rather than in the ear: duc is \dyk\ while dy is \dy\. 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 adjective), which is usually the fastest check. Our composite confusion score for this pair is 47682, derived from the frequency rank of both members and their visual similarity.
duc is recorded at frequency rank #2,118, classified as anoun, pronounced \dyk\. dy is at rank #45,564, tagged as anadj, pronounced \dy\.
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 47682, this pair ranks #185,000 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of duc vs dy
Shared letters: d. Private to "duc": cu. Private to "dy": y.
"duc" · 3 letters · shape CVC · "dy" · 2 letters · shape CV
Frequently Asked Questions
Is swapping "duc" for "dy" ever safe?
Frequency check: "duc" vs "dy" - 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 "duc" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "dy" - compare definitions side by side with the headword page. Word entry
- This pair ranks #185,000 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "duc" and "dy" also get mixed up with nearby pairs, the highest-scored neighbour is "dray vs dy". Nearby pair
Confusion rank #185,000 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.