fail vs fib, What's the Difference?

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 spellings diverge

Shared letters are muted; the letters that actually set fail and fib apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.

4 ch

fail

3 ch

fib

Spelling & Dictionary Insight

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

Frequency comparison

fail#2,441

fib#43,642

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "fail" and "fib" be used interchangeably?

No - they are not even the same part of speech. "fail" is a verb and "fib" a noun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "fail" or "fib"?

"fail" is the more common of the two: it sits at frequency rank #2,441 in our English list, against #43,642 for "fib". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Remembering fail vs fib

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 “fib”.
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