Which to use
“sieur” and “sinus” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #15,760
- “sieur” frequency rank
- #26,185
- “sinus” frequency rank
- 41945
- confusion score
Side-by-Side Comparison
| Feature | sieur | sinus |
|---|---|---|
| Definition | Monsieur. | Formation anatomique creuse, liquidienne ou pneumatique. |
Where the eye mixes sieur and sinus
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between sieur and sinus
A purely visual mix-up. sieur (\sjœʁ\) and sinus (\si.nys\) 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 41945, derived from the frequency rank of both members and their visual similarity.
sieur is recorded at frequency rank #15,760, classified as anoun, pronounced \sjœʁ\. sinus is at rank #26,185, tagged as anoun, pronounced \si.nys\.
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 41945, this pair ranks #229,372 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of sieur vs sinus
Shared letters: isu. Private to "sieur": er. Private to "sinus": n.
"sieur" · 5 letters · shape CVVVC · "sinus" · 5 letters · shape CVCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "sieur" for "sinus" ever safe?
Frequency check: "sieur" vs "sinus" - which ranks higher?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "sieur" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sinus" - compare definitions side by side with the headword page. Word entry
- This pair ranks #229,372 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "sieur" and "sinus" also get mixed up with nearby pairs, the highest-scored neighbour is "sinus vs sires". 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 #229,372 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.