Which to use
“SDIS” and “STS” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #44,180
- “SDIS” frequency rank
- #40,514
- “STS” frequency rank
- 84694
- confusion score
Side-by-Side Comparison
| Feature | SDIS | STS |
|---|---|---|
| Definition | Service départemental d’incendie et de secours, chargé dans un département d’analyser les risques et d’organiser les services de secours. | Navette spatiale américaine ayant effectué 135 vols pour l'agence spatiale américaine (NASA) entre le 12 avril 1981 et juillet 2011. |
Letter map: SDIS vs STS
Shared letters muted; letters that set SDIS and STS apart highlighted. Shared run: 2. SDIS runs 4 letters (CCVC) against STS's 3 (CCC) - the length gap alone is often enough to separate them once you know to check it.
Spelling & dictionary notes on SDIS vs STS
SDIS and STS are indexed as a confusable French pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 84694, derived from the frequency rank of both members and their visual similarity.
SDIS is recorded at frequency rank #44,180, classified as anoun. STS is at rank #40,514, tagged as anoun, pronounced \ɛs te ɛs\.
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 84694, this pair ranks #12,518 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of SDIS vs STS
Shared letters: s. Private to "SDIS": di. Private to "STS": t.
"SDIS" · 4 letters · shape CCVC · "STS" · 3 letters · shape CCC
Known mistypes of this pair
- SDIS ← dsis · sddis · sdiss · sdsi · sids · ssdis
Frequently Asked Questions
Can "SDIS" and "STS" be used interchangeably?
In ordinary French text, does "SDIS" or "STS" show up more?
What to do next
Done with this confusable. These links stay specific to "SDIS" and "STS".
- Full dictionary entry for "SDIS" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "STS" - compare definitions side by side with the headword page. Word entry
- This pair ranks #12,518 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "SDIS" and "STS" also get mixed up with nearby pairs, the highest-scored neighbour is "SDIS vs spi". 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 #12,518 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.