Which to use
“fog” and “foi” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #46,768
- “fog” frequency rank
- #1,478
- “foi” frequency rank
- 48246
- confusion score
Side-by-Side Comparison
| Feature | fog | foi |
|---|---|---|
| Definition | Brouillard, brume. | Croyance aux dogmes de la religion, en Dieu. |
Where the eye mixes fog and foi
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses fog with foi
A purely visual mix-up. fog (\fɔɡ\) 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 differ by a single letter - g in “fog” becomes i in “foi”. Our composite confusion score for this pair is 48246, derived from the frequency rank of both members and their visual similarity.
fog is recorded at frequency rank #46,768, classified as anoun, pronounced \fɔɡ\. 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 48246, this pair ranks #180,449 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fog vs foi
Shared letters: fo. Private to "fog": g. Private to "foi": i.
"fog" · 3 letters · shape CVC · "foi" · 3 letters · shape CVV
Frequently Asked Questions
Is swapping "fog" for "foi" ever safe?
Frequency check: "fog" vs "foi" - which ranks higher?
What to do next
Eye-level mix-up between "fog" and "foi" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "fog" 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 #180,449 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "fog" and "foi" also get mixed up with nearby pairs, the highest-scored neighbour is "Fee vs fog". Nearby pair
Confusion rank #180,449 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.