SCOvsslyWhich spelling fits?

Quick tell: SCO is a noun, sly is an adjective, so they fill different roles in a sentence.

Which to use

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

#32,183
“SCO” frequency rank
#47,613
“sly” frequency rank
79796
confusion score

Side-by-Side Comparison

Feature SCO sly
Definition Club de football basé à Angers, de son nom complet Angers Sporting Club de l’Ouest. Matois, malin.

Where the eye mixes SCO and sly

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. SCO and sly follow the identical consonant-vowel pattern (CCV). Same shape at a glance is often the real trap, independent of shared letters.

3 ch
SCO
3 ch
sly

Visual trap between SCO and sly

These two trip readers on the page rather than in the ear: SCO is \sko\ while sly is \ˈslaɪ\. 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 (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 79796, derived from the frequency rank of both members and their visual similarity.

SCO is recorded at frequency rank #32,183, classified as anoun, pronounced \sko\. sly is at rank #47,613, tagged as anadj, pronounced \ˈslaɪ\.

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 79796, this pair ranks #22,477 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of SCO vs sly

Shared letters: s. Private to "SCO": co. Private to "sly": ly.

"SCO" · 3 letters · shape CCV  ·  "sly" · 3 letters · shape CCV

Frequently Asked Questions

Is swapping "SCO" for "sly" ever safe?
No - they are not even the same part of speech. "SCO" is a noun and "sly" an adjective, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "SCO" vs "sly" - which ranks higher?
"SCO" is the more common of the two: it sits at frequency rank #32,183 in our French list, against #47,613 for "sly". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

  • Full dictionary entry for "SCO" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sly" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #22,477 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "SCO" and "sly" also get mixed up with nearby pairs, the highest-scored neighbour is "sly vs suu". Nearby pair

Confusion rank #22,477 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