Which to use
“fiel” and “fioul” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #36,843
- “fiel” frequency rank
- #27,065
- “fioul” frequency rank
- 63908
- confusion score
Side-by-Side Comparison
| Feature | fiel | fioul |
|---|---|---|
| Definition | Bile, généralement celle du bœuf. | Distillat lourd du pétrole, utilisé comme combustible pour des installations de chauffage domestiques ou industrielles, comme carburant pour les gros moteurs diesels. |
Where the eye mixes fiel and fioul
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between fiel and fioul
A purely visual mix-up. fiel (\fjɛl\) and fioul (\fjul\) 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 63908, derived from the frequency rank of both members and their visual similarity.
fiel is recorded at frequency rank #36,843, classified as anoun, pronounced \fjɛl\. fioul is at rank #27,065, tagged as anoun, pronounced \fjul\.
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 63908, this pair ranks #79,596 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of fiel vs fioul
Shared letters: fil. Private to "fiel": e. Private to "fioul": ou.
"fiel" · 4 letters · shape CVVC · "fioul" · 5 letters · shape CVVVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "fiel" for "fioul" ever safe?
Frequency check: "fiel" vs "fioul" - which ranks higher?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "fiel" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fioul" - compare definitions side by side with the headword page. Word entry
- This pair ranks #79,596 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "fiel" and "fioul" also get mixed up with nearby pairs, the highest-scored neighbour is "fiel vs filez". 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 #79,596 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.