flatvsfoutWhich spelling fits?

Quick tell: flat is a adjective, fout is a verb, so they fill different roles in a sentence.

Which to use

“flat” is an adjective and “fout” is a verb - they look or sound alike but fill different roles in a sentence.

#26,369
“flat” frequency rank
#3,403
“fout” frequency rank
29772
confusion score

Side-by-Side Comparison

Feature flat fout
Definition Se dit du ver à soie atteint de flacherie. Troisième personne du singulier de l’indicatif présent de foutre.

Letter map: flat vs fout

Shared letters muted; letters that set flat and fout apart highlighted. Shared run: 2.

4 ch
flat
4 ch
fout

Part-of-speech tell for flat / fout

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: flat is anadjective and foutaverb. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 29772, derived from the frequency rank of both members and their visual similarity.

flat is recorded at frequency rank #26,369, classified as anadj, pronounced \fla\. fout is at rank #3,403, tagged as averb.

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 29772, this pair ranks #314,596 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of flat vs fout

Shared letters: ft. Private to "flat": al. Private to "fout": ou.

"flat" · 4 letters · shape CCVC  ·  "fout" · 4 letters · shape CVVC

Known mistypes of this pair

  • flatfalt · fflat · flatt · fllat · flta · lfat
  • foutffout · fotu · foutt · fuot · ofut

Frequently Asked Questions

Is swapping "flat" for "fout" ever safe?
No - they are not even the same part of speech. "flat" is an adjective and "fout" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "flat" or "fout" show up more?
"fout" is the more common of the two: it sits at frequency rank #3,403 in our French list, against #26,369 for "flat". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "flat" and "fout".

  • Full dictionary entry for "flat" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fout" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #314,596 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "flat" and "fout" also get mixed up with nearby pairs, the highest-scored neighbour is "ffa vs flat". 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 #314,596 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list