Which to use
“du” is an article and “duc” is a noun - they look or sound alike but fill different roles in a sentence.
- #17
- “du” frequency rank
- #2,118
- “duc” frequency rank
- 2135
- confusion score
Side-by-Side Comparison
| Feature | du | duc |
|---|---|---|
| Definition | Une quantité indéfinie de. Note d’usage : Utilisé avec un nom indénombrable. | Titre qui était le plus élevé parmi l’ancienne noblesse de France et de quelques autres États. |
Where the spellings diverge
Shared letters are muted; the letters that actually set du and duc apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
du and duc form a confusable pair in the French index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by 1 extra letter(s) - “du” sits inside “duc” - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 2135, derived from the frequency rank of both members and their visual similarity.
du is recorded at frequency rank #17, classified as anarticle, pronounced \dy\. duc is at rank #2,118, tagged as anoun, pronounced \dyk\.
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 2135, this pair ranks #436,718 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Frequency comparison
Frequently Asked Questions
Can "du" and "duc" be used interchangeably?
Remembering du vs duc
The fastest way to pick the right one every time.
- Check the role first: if you need an article, it's “du”; for a noun, it's “duc”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “du” entry
- Browse more pairs most likely to be confused. Most confusable