Which to use
“fer” and “foi” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #1,262
- “fer” frequency rank
- #1,478
- “foi” frequency rank
- 2740
- confusion score
Side-by-Side Comparison
| Feature | fer | foi |
|---|---|---|
| Definition | Élément chimique de numéro atomique 26 et de symbole Fe qui fait partie des métaux de transition. | Croyance aux dogmes de la religion, en Dieu. |
Where the eye mixes fer and foi
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between fer and foi
A purely visual mix-up. fer (\fɛʁ\) and foi (\fwa\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 2740, derived from the frequency rank of both members and their visual similarity.
fer is recorded at frequency rank #1,262, classified as anoun, pronounced \fɛʁ\. foi is at rank #1,478, tagged as anoun, pronounced \fwa\.
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 2740, this pair ranks #435,573 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of fer vs foi
Shared letters: f. Private to "fer": er. Private to "foi": io.
"fer" · 3 letters · shape CVC · "foi" · 3 letters · shape CVV
Frequently Asked Questions
Can "fer" and "foi" be used interchangeably?
In ordinary French text, does "fer" or "foi" show up more?
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 "fer" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "foi" - compare definitions side by side with the headword page. Word entry
- This pair ranks #435,573 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "fer" and "foi" also get mixed up with nearby pairs, the highest-scored neighbour is "Fee vs foi". Nearby pair
Confusion rank #435,573 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.