Which to use
“fib” and “fibre” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #43,642
- “fib” frequency rank
- #11,694
- “fibre” frequency rank
- 55336
- confusion score
Side-by-Side Comparison
| Feature | fib | fibre |
|---|---|---|
| Definition | A lie, especially one that is more or less inconsequential. | A single piece of a given material, elongated and roughly round in cross-section, often twisted with other fibres to form thread. |
Where the eye mixes fib and fibre
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. fib runs 3 letters (CVC) against fibre's 5 (CVCCV) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between fib and fibre
A purely visual mix-up. fib (/fɪb/) and fibre (/ˈfaɪ.bə(ɹ)/) 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 2 extra letter(s) - “fib” sits inside “fibre”. Our composite confusion score for this pair is 55336, derived from the frequency rank of both members and their visual similarity.
fib is recorded at frequency rank #43,642, classified as anoun, pronounced /fɪb/. fibre is at rank #11,694, tagged as anoun, pronounced /ˈfaɪ.bə(ɹ)/.
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 55336, this pair ranks #134,388 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of fib vs fibre
Shared letters: bfi. Private to "fib": -. Private to "fibre": er.
"fib" · 3 letters · shape CVC · "fibre" · 5 letters · shape CVCCV
Known mistypes of this pair
- fibre ← fbire · ffibre · fibbre · fibrre · firbe · ifbre
Frequently Asked Questions
Is swapping "fib" for "fibre" ever safe?
Which is more common, "fib" or "fibre"?
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 "fib" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fibre" - compare definitions side by side with the headword page. Word entry
- This pair ranks #134,388 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "fib" and "fibre" 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 #134,388 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.