Which to use
“fai” is a verb and “fog” is a noun - they look or sound alike but fill different roles in a sentence.
- #11,967
- “fai” frequency rank
- #46,768
- “fog” frequency rank
- 58735
- confusion score
Side-by-Side Comparison
| Feature | fai | fog |
|---|---|---|
| Definition | Deuxième personne du pluriel de l’indicatif présent de fer. | Brouillard, brume. |
Where the eye mixes fai and fog
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between fai and fog
These two trip readers on the page rather than in the ear: fai is [ˈfa.i] while fog is \fɔɡ\. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 58735, derived from the frequency rank of both members and their visual similarity.
fai is recorded at frequency rank #11,967, classified as averb, pronounced [ˈfa.i]. fog is at rank #46,768, tagged as anoun, pronounced \fɔɡ\.
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 58735, this pair ranks #107,246 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of fai vs fog
Shared letters: f. Private to "fai": ai. Private to "fog": go.
"fai" · 3 letters · shape CVV · "fog" · 3 letters · shape CVC
Frequently Asked Questions
Can "fai" and "fog" be used interchangeably?
Frequency check: "fai" vs "fog" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "fai" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fog" - compare definitions side by side with the headword page. Word entry
- This pair ranks #107,246 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "fai" and "fog" also get mixed up with nearby pairs, the highest-scored neighbour is "Fee vs fog". Nearby pair
Confusion rank #107,246 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.