Which to use
“CDU” and “co” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #23,795
- “CDU” frequency rank
- #1,856
- “co” frequency rank
- 25651
- confusion score
Side-by-Side Comparison
| Feature | CDU | co |
|---|---|---|
| Definition | Critère de défaillance unique. | Connexion. |
Where the eye mixes CDU and co
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between CDU and co
A purely visual mix-up. CDU (\se.de.y\) and co (\ko\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 25651, derived from the frequency rank of both members and their visual similarity.
CDU is recorded at frequency rank #23,795, classified as anoun, pronounced \se.de.y\. co is at rank #1,856, tagged as anoun, pronounced \ko\.
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 25651, this pair ranks #339,636 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of CDU vs co
Shared letters: c. Private to "CDU": du. Private to "co": o.
"CDU" · 3 letters · shape CCV · "co" · 2 letters · shape CV
Frequently Asked Questions
Is swapping "CDU" for "co" ever safe?
Which is more common, "CDU" or "co"?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "CDU" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "co" - compare definitions side by side with the headword page. Word entry
- This pair ranks #339,636 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "CDU" and "co" also get mixed up with nearby pairs, the highest-scored neighbour is "CCE vs CDU". Nearby pair
Confusion rank #339,636 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.