Which to use
“sin” is a symbol and “sinus” is a noun - they look or sound alike but fill different roles in a sentence.
- #16,237
- “sin” frequency rank
- #26,185
- “sinus” frequency rank
- 42422
- confusion score
Side-by-Side Comparison
| Feature | sin | sinus |
|---|---|---|
| Definition | Sinus. | Formation anatomique creuse, liquidienne ou pneumatique. |
Letter map: sin vs sinus
Shared letters muted; letters that set sin and sinus apart highlighted. Shared run: 3.
Role in the sentence - sin and sinus
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sin is asymbol and sinusanoun. On the page they differ by 2 extra letter(s) - “sin” sits inside “sinus”. Our composite confusion score for this pair is 42422, derived from the frequency rank of both members and their visual similarity.
sin is recorded at frequency rank #16,237, classified as asymbol. 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 42422, this pair ranks #225,724 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of sin vs sinus
Shared letters: ins. Private to "sin": -. Private to "sinus": u.
"sin" · 3 letters · shape CVC · "sinus" · 5 letters · shape CVCVC
Known mistypes of this pair
- sinus ← isnus · sinnus · sinsu · sinuss · siuns · snius · ssinus
Frequently Asked Questions
Is swapping "sin" for "sinus" ever safe?
Frequency check: "sin" vs "sinus" - which ranks higher?
What to do next
Pair "sin" vs "sinus" is on the table, pick a follow-up below.
- Full dictionary entry for "sin" 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 #225,724 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "sin" 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 #225,724 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.