cecvsCSMWhich spelling fits?

Quick tell: cec is a adjective, CSM is a noun, so they fill different roles in a sentence.

Which to use

“cec” is an adjective and “CSM” is a noun - they look or sound alike but fill different roles in a sentence.

#46,636
“cec” frequency rank
#39,735
“CSM” frequency rank
86371
confusion score

Side-by-Side Comparison

Feature cec CSM
Definition Aveugle. Centre de commutation du service des mobiles.

Where the eye mixes cec and CSM

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. cec (CVC) and CSM (CCC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch
cec
3 ch
CSM

Visual trap between cec and CSM

These two trip readers on the page rather than in the ear: cec is \ˈsek\ while CSM is \se.es.em\. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 86371, derived from the frequency rank of both members and their visual similarity.

cec is recorded at frequency rank #46,636, classified as anadj, pronounced \ˈsek\. CSM is at rank #39,735, tagged as anoun, pronounced \se.es.em\.

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 86371, this pair ranks #9,801 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of cec vs CSM

Shared letters: c. Private to "cec": e. Private to "CSM": ms.

"cec" · 3 letters · shape CVC  ·  "CSM" · 3 letters · shape CCC

Frequently Asked Questions

Do "cec" and "CSM" mean the same thing in a sentence?
No - they are not even the same part of speech. "cec" is an adjective and "CSM" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "cec" or "CSM" show up more?
"CSM" is the more common of the two: it sits at frequency rank #39,735 in our French list, against #46,636 for "cec". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "cec" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "CSM" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #9,801 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "cec" and "CSM" also get mixed up with nearby pairs, the highest-scored neighbour is "CCE vs cec". Nearby pair

Confusion rank #9,801 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