seinsvssinTell them apart

Quick tell: seins is a noun, sin is a symbol, so they fill different roles in a sentence.

Which to use

“seins” is a noun and “sin” is a symbol - they look or sound alike but fill different roles in a sentence.

#4,099
“seins” frequency rank
#16,237
“sin” frequency rank
20336
confusion score

Side-by-Side Comparison

Feature seins sin
Definition Pluriel de sein. Sinus.

Letter map: seins vs sin

Shared letters muted; letters that set seins and sin apart highlighted. Shared run: 3.

5 ch
seins
3 ch
sin

Part-of-speech tell for seins / sin

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: seins is anoun and sinasymbol. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 20336, derived from the frequency rank of both members and their visual similarity.

seins is recorded at frequency rank #4,099, classified as anoun, pronounced \sɛ̃\. sin is at rank #16,237, tagged as asymbol.

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 20336, this pair ranks #368,792 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of seins vs sin

Shared letters: ins. Private to "seins": e. Private to "sin": -.

"seins" · 5 letters · shape CVVCC  ·  "sin" · 3 letters · shape CVC

Known mistypes of this pair

  • seinsesins · seinns · seinss · seisn · senis · sseins

Frequently Asked Questions

Can "seins" and "sin" be used interchangeably?
No - they are not even the same part of speech. "seins" is a noun and "sin" a symbol, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "seins" or "sin"?
"seins" is the more common of the two: it sits at frequency rank #4,099 in our French list, against #16,237 for "sin". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Done with this confusable. These links stay specific to "seins" and "sin".

  • Full dictionary entry for "seins" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sin" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #368,792 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "seins" and "sin" also get mixed up with nearby pairs, the highest-scored neighbour is "sin vs suu". 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 #368,792 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