Which to use
“fai” is a verb and “fas” is a noun - they look or sound alike but fill different roles in a sentence.
- #40,830
- “fai” frequency rank
- #27,227
- “fas” frequency rank
- 68057
- confusion score
Side-by-Side Comparison
| Feature | fai | fas |
|---|---|---|
| Definition | Tercera persona del singular (el, ela, vostede) del presente de indicativo de facer. | Cara, faz, haz, jeta, rostro. |
Where the spellings diverge
Shared letters are muted; the letters that actually set fai and fas apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: fai is [ˈfa̠j] while fas is /ˈfasː/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - i in “fai” becomes s in “fas”, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 68057, derived from the frequency rank of both members and their visual similarity.
fai is recorded at frequency rank #40,830, classified as averb, pronounced [ˈfa̠j]. fas is at rank #27,227, tagged as anoun, pronounced /ˈfasː/.
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 68057, this pair ranks #35,505 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of fai vs fas
Shared letters: af. Private to "fai": i. Private to "fas": s.
"fai" · 3 letters · shape CVV · "fas" · 3 letters · shape CVC
Frequency comparison
Frequently Asked Questions
Can "fai" and "fas" be used interchangeably?
Which is more common, "fai" or "fas"?
Remembering fai vs fas
The fastest way to pick the right one every time.
- Check the role first: if you need a verb, it's “fai”; for a noun, it's “fas”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “fai” entry
- Browse more pairs most likely to be confused. Most confusable