Which to use
“fail” is a verb and “foi” is a noun - they look or sound alike but fill different roles in a sentence.
- #2,441
- “fail” frequency rank
- #42,644
- “foi” frequency rank
- 45085
- confusion score
Side-by-Side Comparison
| Feature | fail | foi |
|---|---|---|
| Definition | To be unsuccessful. | A depiction of a handshake. |
Where the spellings diverge
Shared letters are muted; the letters that actually set fail and foi apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: fail is averb and foianoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 45085, derived from the frequency rank of both members and their visual similarity.
fail is recorded at frequency rank #2,441, classified as averb, pronounced /feɪl/. foi is at rank #42,644, 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 45085, this pair ranks #224,563 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fail vs foi
Shared letters: fi. Private to "fail": al. Private to "foi": o.
"fail" · 4 letters · shape CVVC · "foi" · 3 letters · shape CVV
Known mistypes of this pair
- fail ← afil · faill · fali · ffail · fial
Frequency comparison
Frequently Asked Questions
Can "fail" and "foi" be used interchangeably?
Which is more common, "fail" or "foi"?
Remembering fail vs foi
The fastest way to pick the right one every time.
- Check the role first: if you need a verb, it's “fail”; for a noun, it's “foi”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “fail” entry
- Browse more pairs most likely to be confused. Most confusable