Which to use
“Fax” is a noun and “fou” is an adjective - they look or sound alike but fill different roles in a sentence.
- #15,379
- “Fax” frequency rank
- #1,063
- “fou” frequency rank
- 16442
- confusion score
Side-by-Side Comparison
| Feature | Fax | fou |
|---|---|---|
| Definition | Télécopieur, téléfax, fax, appareil permettant la numérisation, la transmission, la réception, et l’impression du facsimilé. | Qualifie une personne qui a perdu la raison, qui est atteinte d’aliénation mentale. |
Where the eye mixes Fax and fou
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between Fax and fou
These two trip readers on the page rather than in the ear: Fax is \faks\ while fou is \fu\. 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 (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 16442, derived from the frequency rank of both members and their visual similarity.
Fax is recorded at frequency rank #15,379, classified as anoun, pronounced \faks\. fou is at rank #1,063, tagged as anadj, pronounced \fu\.
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 16442, this pair ranks #387,828 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of Fax vs fou
Shared letters: f. Private to "Fax": ax. Private to "fou": ou.
"Fax" · 3 letters · shape CVC · "fou" · 3 letters · shape CVV
Frequently Asked Questions
Is swapping "Fax" for "fou" ever safe?
Frequency check: "Fax" vs "fou" - which ranks higher?
After this comparison
Eye-level mix-up between "Fax" and "fou" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "Fax" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fou" - compare definitions side by side with the headword page. Word entry
- This pair ranks #387,828 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "Fax" and "fou" also get mixed up with nearby pairs, the highest-scored neighbour is "Fax vs Fee". Nearby pair
Confusion rank #387,828 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.