CDS vs cer, What's the Difference?

Which to use

“CDS” and “cer” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#28,477
“CDS” frequency rank: #46,052
“cer” frequency rank: 74529
confusion score

Side-by-Side Comparison

Feature	CDS	cer
Definition	Séquence codante, région d'une séquence d'ADN codant une séquence d'acides aminés de protéine.	Ciel.

Where the eye mixes CDS and cer

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch

CDS

3 ch

cer

Look-alike desk: CDS vs cer

A purely visual mix-up. CDS (\se.de.ɛs\) and cer (\ˈʧeɾ\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 74529, derived from the frequency rank of both members and their visual similarity.

CDS is recorded at frequency rank #28,477, classified as anoun, pronounced \se.de.ɛs\. cer is at rank #46,052, tagged as anoun, pronounced \ˈʧeɾ\.

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 74529, this pair ranks #36,864 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of CDS vs cer

Shared letters: c. Private to "CDS": ds. Private to "cer": er.

"CDS" · 3 letters · shape CCC · "cer" · 3 letters · shape CVC

Frequently Asked Questions

Can "CDS" and "cer" be used interchangeably?

No. They are said differently (\se.de.ɛs\ versus \ˈʧeɾ\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

In ordinary French text, does "CDS" or "cer" show up more?

"CDS" is the more common of the two: it sits at frequency rank #28,477 in our French list, against #46,052 for "cer". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "CDS" and "cer" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "CDS" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "cer" - compare definitions side by side with the headword page. Word entry
This pair ranks #36,864 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"CDS" and "cer" also get mixed up with nearby pairs, the highest-scored neighbour is "cer vs ciro". Nearby pair

Confusion rank #36,864 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.