Which to use
“fac” and “foi” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #3,608
- “fac” frequency rank
- #1,478
- “foi” frequency rank
- 5086
- confusion score
Side-by-Side Comparison
| Feature | fac | foi |
|---|---|---|
| Definition | Faculté ; université. | Croyance aux dogmes de la religion, en Dieu. |
Where the eye mixes fac and foi
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between fac and foi
A purely visual mix-up. fac (\fak\) 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 5086, derived from the frequency rank of both members and their visual similarity.
fac is recorded at frequency rank #3,608, classified as anoun, pronounced \fak\. 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 5086, this pair ranks #429,938 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of fac vs foi
Shared letters: f. Private to "fac": ac. Private to "foi": io.
"fac" · 3 letters · shape CVC · "foi" · 3 letters · shape CVV
Frequently Asked Questions
Do "fac" and "foi" mean the same thing in a sentence?
Which is more common, "fac" or "foi"?
Useful next steps
Eye-level mix-up between "fac" and "foi" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "fac" 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 #429,938 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "fac" and "foi" also get mixed up with nearby pairs, the highest-scored neighbour is "fac vs Fee". Nearby pair
Confusion rank #429,938 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.