Which to use
“fœtus” is a noun and “fus” is a verb - they look or sound alike but fill different roles in a sentence.
- #19,296
- “fœtus” frequency rank
- #19,029
- “fus” frequency rank
- 38325
- confusion score
Side-by-Side Comparison
| Feature | fœtus | fus |
|---|---|---|
| Definition | Organisme en voie de développement, chez les animaux vivipares. Il a dépassé le stade d’embryon mais n’est pas encore né. | Première personne du singulier du passé simple de être. |
Where the eye mixes fœtus and fus
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. fœtus runs 5 letters (CVCVC) against fus's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between fœtus and fus
These two trip readers on the page rather than in the ear: fœtus is \fe.tys\ while fus is \fy\. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 38325, derived from the frequency rank of both members and their visual similarity.
fœtus is recorded at frequency rank #19,296, classified as anoun, pronounced \fe.tys\. fus is at rank #19,029, tagged as averb, pronounced \fy\.
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 38325, this pair ranks #256,049 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fœtus vs fus
Shared letters: fsu. Private to "fœtus": tœ. Private to "fus": -.
"fœtus" · 5 letters · shape CVCVC · "fus" · 3 letters · shape CVC
Frequently Asked Questions
Do "fœtus" and "fus" mean the same thing in a sentence?
In ordinary French text, does "fœtus" or "fus" 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 "fœtus" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fus" - compare definitions side by side with the headword page. Word entry
- This pair ranks #256,049 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "fœtus" and "fus" also get mixed up with nearby pairs, the highest-scored neighbour is "Fee vs fus". Nearby pair
Confusion rank #256,049 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.