clésvsCsConfusable pair

Which to use

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

#2,666
“clés” frequency rank
#10,681
“Cs” frequency rank
13347
confusion score

Side-by-Side Comparison

Feature clés Cs
Definition Pluriel de clé. Pluriel de C.

Where the eye mixes clés and Cs

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
clés
2 ch
Cs

Visual trap between clés and Cs

A purely visual mix-up. clés (\kle\) and Cs (\tseːs\) 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 2 letter(s) in length. Our composite confusion score for this pair is 13347, derived from the frequency rank of both members and their visual similarity.

clés is recorded at frequency rank #2,666, classified as anoun, pronounced \kle\. Cs is at rank #10,681, tagged as anoun, pronounced \tseːs\.

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 13347, this pair ranks #401,385 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of clés vs Cs

Shared letters: cs. Private to "clés": . Private to "Cs": -.

"clés" · 4 letters · shape CCVC  ·  "Cs" · 2 letters · shape CC

Frequently Asked Questions

Can "clés" and "Cs" be used interchangeably?
No. They are said differently (\kle\ versus \tseːs\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "clés" or "Cs"?
"clés" is the more common of the two: it sits at frequency rank #2,666 in our French list, against #10,681 for "Cs". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "clés" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Cs" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #401,385 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "clés" and "Cs" also get mixed up with nearby pairs, the highest-scored neighbour is "CCE vs Cs". Nearby pair

Confusion rank #401,385 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list