faillevsfouilleWhat's the difference?

Which to use

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

#6,087
“faille” frequency rank
#11,056
“fouille” frequency rank
17143
confusion score

Side-by-Side Comparison

Feature faille fouille
Definition Fracture, fissure avec rejet des deux blocs situés de part et d’autre de la cassure. Ouverture que l’on pratique dans la terre pour mettre à découvert ce qui y est enfermé ou pour faire les fondations d’une maison, pour creuser une mine, un canal, etc.

Where the eye mixes faille and fouille

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. faille runs 6 letters (CVVCCV) against fouille's 7 (CVVVCCV) - the length gap alone is often enough to separate them once you know to check it.

6 ch
faille
7 ch
fouille

Look-alike desk: faille vs fouille

A purely visual mix-up. faille (\faj\) and fouille (\fuj\) 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 17143, derived from the frequency rank of both members and their visual similarity.

faille is recorded at frequency rank #6,087, classified as anoun, pronounced \faj\. fouille is at rank #11,056, tagged as anoun, pronounced \fuj\.

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 17143, this pair ranks #384,593 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of faille vs fouille

Shared letters: efil. Private to "faille": a. Private to "fouille": ou.

"faille" · 6 letters · shape CVVCCV  ·  "fouille" · 7 letters · shape CVVVCCV

Known mistypes of this pair

  • faille ← afille · faile · failel · falile · ffaille · fialle
  • fouille ← ffouille · foiulle · fouile · fouilel · foulile · fuoille · ofuille

Frequently Asked Questions

Can "faille" and "fouille" be used interchangeably?
No. They are said differently (\faj\ versus \fuj\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "faille" or "fouille"?
"faille" is the more common of the two: it sits at frequency rank #6,087 in our French list, against #11,056 for "fouille". 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 "faille" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fouille" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #384,593 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "faille" and "fouille" also get mixed up with nearby pairs, the highest-scored neighbour is "fouille vs fourmille". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #384,593 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