Which to use
“fast” is an adverb and “fis” is a verb - they look or sound alike but fill different roles in a sentence.
- #243
- “fast” frequency rank
- #26,408
- “fis” frequency rank
- 26651
- confusion score
Side-by-Side Comparison
| Feature | fast | fis |
|---|---|---|
| Definition | nicht ganz | 1. Person Singulra Indikativ historisches Perfekt Aktiv des Verbs faire |
Where the eye mixes fast and fis
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: fast is [fast] while fis is [fi]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adverb vs verb), which is usually the fastest check. Our composite confusion score for this pair is 26651, derived from the frequency rank of both members and their visual similarity.
fast is recorded at frequency rank #243, classified as anadv, pronounced [fast]. fis is at rank #26,408, tagged as averb, pronounced [fi].
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 26651, this pair ranks #1,814,676 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of fast vs fis
Shared letters: fs. Private to "fast": at. Private to "fis": i.
"fast" · 4 letters · shape CVCC · "fis" · 3 letters · shape CVC
Known mistypes of this pair
- fast ← afst · fastt · fats · ffast · fsat
Frequently Asked Questions
Can "fast" and "fis" be used interchangeably?
Which is more common, "fast" or "fis"?
What to do next
You've compared "fast" and "fis". Here's where to go from here.
- Full dictionary entry for "fast" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fis" - compare definitions side by side with the headword page. Word entry
- This pair ranks #1,814,676 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "fast" and "fis" also get mixed up with nearby pairs, the highest-scored neighbour is "fis vs fist". 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
PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.