Which to use
“fast” is an adverb and “FFS” is a noun - they look or sound alike but fill different roles in a sentence.
- #8,544
- “fast” frequency rank
- #47,896
- “FFS” frequency rank
- 56440
- confusion score
Side-by-Side Comparison
| Feature | fast | FFS |
|---|---|---|
| Definition | Presque, quasiment. | Chirurgie de féminisation faciale, parfois effectuée par les femmes trans. |
Letter map: fast vs FFS
Shared letters muted; letters that set fast and FFS apart highlighted. Shared run: 2.
Part-of-speech tell for fast / FFS
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: fast is anadverb and FFSanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 56440, derived from the frequency rank of both members and their visual similarity.
fast is recorded at frequency rank #8,544, classified as anadv, pronounced \fast\. FFS is at rank #47,896, tagged as anoun.
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 56440, this pair ranks #121,084 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fast vs FFS
Shared letters: fs. Private to "fast": at. Private to "FFS": -.
"fast" · 4 letters · shape CVCC · "FFS" · 3 letters · shape CCC
Known mistypes of this pair
- fast ← afst · fasst · fastt · fats · ffast · fsat
Frequently Asked Questions
Is swapping "fast" for "FFS" ever safe?
In ordinary French text, does "fast" or "FFS" show up more?
Useful next steps
Pair "fast" vs "FFS" is on the table, pick a follow-up below.
- Full dictionary entry for "fast" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "FFS" - compare definitions side by side with the headword page. Word entry
- This pair ranks #121,084 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "fast" and "FFS" also get mixed up with nearby pairs, the highest-scored neighbour is "Fee vs FFS". 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 #121,084 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.