Which to use
“fast” is an adjective and “FS” is a verb - they look or sound alike but fill different roles in a sentence.
- #767
- “fast” frequency rank
- #16,922
- “FS” frequency rank
- 17689
- confusion score
Side-by-Side Comparison
| Feature | fast | FS |
|---|---|---|
| Definition | Firmly or securely fixed in place; stable. | Abbreviation of fingerspell. |
Letter map: fast vs FS
Shared letters muted; letters that set fast and FS apart highlighted. Shared run: 2.
Spelling & Dictionary Insight
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: fast is anadjective and FSaverb. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 17689, derived from the frequency rank of both members and their visual similarity.
fast is recorded at frequency rank #767, classified as anadj, pronounced /fɑːst/. FS is at rank #16,922, tagged as averb.
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 17689, this pair ranks #449,782 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of fast vs FS
Shared letters: fs. Private to "fast": at. Private to "FS": -.
"fast" · 4 letters · shape CVCC · "FS" · 2 letters · shape CC
Known mistypes of this pair
- fast ← afst · fasst · fastt · ffast · fsat