Which to use
“fast” is an adjective and “FES” is a noun - they look or sound alike but fill different roles in a sentence.
- #767
- “fast” frequency rank
- #39,812
- “FES” frequency rank
- 40579
- confusion score
Side-by-Side Comparison
| Feature | fast | FES |
|---|---|---|
| Definition | Firmly or securely fixed in place; stable. | Initialism of floppy eyelid syndrome |
Letter map: fast vs FES
Shared letters muted; letters that set fast and FES 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 FESanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 40579, derived from the frequency rank of both members and their visual similarity.
fast is recorded at frequency rank #767, classified as anadj, pronounced /fɑːst/. FES is at rank #39,812, 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 40579, this pair ranks #266,272 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fast vs FES
Shared letters: fs. Private to "fast": at. Private to "FES": e.
"fast" · 4 letters · shape CVCC · "FES" · 3 letters · shape CVC
Known mistypes of this pair
- fast ← afst · fasst · fastt · ffast · fsat