sivsSTIBWhich spelling fits?

Quick tell: si is a conjunction, STIB is a name, so they fill different roles in a sentence.

Which to use

“si” is a conjunction and “STIB” is a name - they look or sound alike but fill different roles in a sentence.

#46
“si” frequency rank
#48,208
“STIB” frequency rank
48254
confusion score

Side-by-Side Comparison

Feature si STIB
Definition Dans le cas où, à condition que, supposé que. Note d’usage : Conjonction qui introduit une condition (suivie d’une conséquence) ou une supposition qui peut être supprimée en utilisant un conditionnel. Entreprise publique responsable du service de transport en commun au sein des communes bruxelloises.

Where the eye mixes si and STIB

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

2 ch
si
4 ch
STIB

Look-alike desk: si vs STIB

These two trip readers on the page rather than in the ear: si is \si\ while STIB is \stib\. 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 (conjunction vs name), which is usually the fastest check. Our composite confusion score for this pair is 48254, derived from the frequency rank of both members and their visual similarity.

si is recorded at frequency rank #46, classified as aconj, pronounced \si\. STIB is at rank #48,208, tagged as aname, pronounced \stib\.

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 48254, this pair ranks #180,373 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of si vs STIB

Shared letters: is. Private to "si": -. Private to "STIB": bt.

"si" · 2 letters · shape CV  ·  "STIB" · 4 letters · shape CCVC

Known mistypes of this pair

  • STIBsitb · sstib · stbi · stibb · sttib · tsib

Frequently Asked Questions

Can "si" and "STIB" be used interchangeably?
No - they are not even the same part of speech. "si" is a conjunction and "STIB" a name, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "si" vs "STIB" - which ranks higher?
"si" is the more common of the two: it sits at frequency rank #46 in our French list, against #48,208 for "STIB". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "si" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "STIB" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #180,373 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "si" and "STIB" also get mixed up with nearby pairs, the highest-scored neighbour is "spi vs STIB". 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 #180,373 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