Which to use
“fei” and “FIV” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #31,027
- “fei” frequency rank
- #49,089
- “FIV” frequency rank
- 80116
- confusion score
Side-by-Side Comparison
| Feature | fei | FIV |
|---|---|---|
| Definition | Variante de foi | Fécondation in vitro, fécondation des ovules par les spermatozoïdes réalisée de façon artificielle. |
Where the eye mixes fei and FIV
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. fei (CVV) and FIV (CVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Look-alike desk: fei vs FIV
A purely visual mix-up. fei (\fei̯\) and FIV (\fiv\) 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 80116, derived from the frequency rank of both members and their visual similarity.
fei is recorded at frequency rank #31,027, classified as anoun, pronounced \fei̯\. FIV is at rank #49,089, tagged as anoun, pronounced \fiv\.
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 80116, this pair ranks #21,701 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of fei vs FIV
Shared letters: fi. Private to "fei": e. Private to "FIV": v.
"fei" · 3 letters · shape CVV · "FIV" · 3 letters · shape CVC
Frequently Asked Questions
Can "fei" and "FIV" be used interchangeably?
In ordinary French text, does "fei" or "FIV" show up more?
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 "fei" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "FIV" - compare definitions side by side with the headword page. Word entry
- This pair ranks #21,701 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "fei" and "FIV" also get mixed up with nearby pairs, the highest-scored neighbour is "Fee vs FIV". Nearby pair
Confusion rank #21,701 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.