Which to use
“fail” is a verb and “fib” is a noun - they look or sound alike but fill different roles in a sentence.
- #2,441
- “fail” frequency rank
- #43,642
- “fib” frequency rank
- 46083
- confusion score
Side-by-Side Comparison
| Feature | fail | fib |
|---|---|---|
| Definition | To be unsuccessful. | A lie, especially one that is more or less inconsequential. |
Where the eye mixes fail and fib
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. fail runs 4 letters (CVVC) against fib's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between fail and fib
These two trip readers on the page rather than in the ear: fail is /feɪl/ while fib is /fɪb/. 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 (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 46083, 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/. fib is at rank #43,642, tagged as anoun, pronounced /fɪb/.
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 46083, this pair ranks #215,142 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fail vs fib
Shared letters: fi. Private to "fail": al. Private to "fib": b.
"fail" · 4 letters · shape CVVC · "fib" · 3 letters · shape CVC
Known mistypes of this pair
- fail ← afil · faill · fali · ffail · fial
Frequently Asked Questions
Do "fail" and "fib" mean the same thing in a sentence?
Which is more common, "fail" or "fib"?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "fail" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fib" - compare definitions side by side with the headword page. Word entry
- This pair ranks #215,142 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "fail" and "fib" also get mixed up with nearby pairs, the highest-scored neighbour is "fib vs foh". 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 #215,142 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.