Which to use
“false” and “fast” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #34,119
- “false” frequency rank
- #16,583
- “fast” frequency rank
- 50702
- confusion score
Side-by-Side Comparison
| Feature | false | fast |
|---|---|---|
| Definition | Falso. | Rápido, veloz. |
Where the eye mixes false and fast
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses false with fast
A purely visual mix-up. false (/fɔːls/) and fast (/fɑːst/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 50702, derived from the frequency rank of both members and their visual similarity.
false is recorded at frequency rank #34,119, classified as anadj, pronounced /fɔːls/. fast is at rank #16,583, tagged as anadj, pronounced /fɑːst/.
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 50702, this pair ranks #101,800 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of false vs fast
Shared letters: afs. Private to "false": el. Private to "fast": t.
"false" · 5 letters · shape CVCCV · "fast" · 4 letters · shape CVCC
Known mistypes of this pair
Frequently Asked Questions
Can "false" and "fast" be used interchangeably?
Frequency check: "false" vs "fast" - which ranks higher?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "false" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fast" - compare definitions side by side with the headword page. Word entry
- This pair ranks #101,800 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "false" and "fast" also get mixed up with nearby pairs, the highest-scored neighbour is "false vs falsear". 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 #101,800 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.