fail vs fas, What's the Difference?

Which to use

“fail” is a verb and “fas” is a noun - they look or sound alike but fill different roles in a sentence.

#24,588
“fail” frequency rank: #47,890
“fas” frequency rank: 72478
confusion score

Side-by-Side Comparison

Feature	fail	fas
Definition	Échouer.	Face, figure, visage.

Where the spellings diverge

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

4 ch

fail

3 ch

fas

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: fail is \feɪl\ while fas is \ˈfasː\. 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 72478, derived from the frequency rank of both members and their visual similarity.

fail is recorded at frequency rank #24,588, classified as averb, pronounced \feɪl\. fas is at rank #47,890, 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 72478, this pair ranks #43,857 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of fail vs fas

Shared letters: af. Private to "fail": il. Private to "fas": s.

"fail" · 4 letters · shape CVVC · "fas" · 3 letters · shape CVC

Known mistypes of this pair

fail ← afil · faill · fali · ffail · fial

Frequency comparison

fail#24,588

fas#47,890

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

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

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

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

"fail" is the more common of the two: it sits at frequency rank #24,588 in our French list, against #47,890 for "fas". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering fail vs fas

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 “fas”.
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