Which to use
“foirer” and “fonder” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #25,319
- “foirer” frequency rank
- #7,963
- “fonder” frequency rank
- 33282
- confusion score
Side-by-Side Comparison
| Feature | foirer | fonder |
|---|---|---|
| Definition | Avoir la diarrhée, évacuer des excréments liquides. | Asseoir un bâtiment, un édifice sur des fondements. |
Where the eye mixes foirer and fonder
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. foirer (CVVCVC) and fonder (CVCCVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Why the eye confuses foirer with fonder
A purely visual mix-up. foirer (\fwa.ʁe\) and fonder (\fɔ̃.de\) 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 33282, derived from the frequency rank of both members and their visual similarity.
foirer is recorded at frequency rank #25,319, classified as averb, pronounced \fwa.ʁe\. fonder is at rank #7,963, tagged as averb, pronounced \fɔ̃.de\.
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 33282, this pair ranks #291,681 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of foirer vs fonder
Shared letters: efor. Private to "foirer": i. Private to "fonder": dn.
"foirer" · 6 letters · shape CVVCVC · "fonder" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Do "foirer" and "fonder" mean the same thing in a sentence?
Frequency check: "foirer" vs "fonder" - which ranks higher?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "foirer" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fonder" - compare definitions side by side with the headword page. Word entry
- This pair ranks #291,681 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "foirer" and "fonder" also get mixed up with nearby pairs, the highest-scored neighbour is "foirer vs fouiner". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #291,681 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.