Which to use
“file” and “flu” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #1,825
- “file” frequency rank
- #7,564
- “flu” frequency rank
- 9389
- confusion score
Side-by-Side Comparison
| Feature | file | flu |
|---|---|---|
| Definition | A collection of papers collated and archived together. | Influenza. |
Where the eye mixes file and flu
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between file and flu
A purely visual mix-up. file (/faɪl/) and flu (/fluː/) 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 1 letter(s) in length. Our composite confusion score for this pair is 9389, derived from the frequency rank of both members and their visual similarity.
file is recorded at frequency rank #1,825, classified as anoun, pronounced /faɪl/. flu is at rank #7,564, tagged as anoun, pronounced /fluː/.
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 9389, this pair ranks #497,640 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of file vs flu
Shared letters: fl. Private to "file": ei. Private to "flu": u.
"file" · 4 letters · shape CVCV · "flu" · 3 letters · shape CCV
Known mistypes of this pair
- file ← ffile · fiel · fille · flie · ifle
Frequently Asked Questions
Is swapping "file" for "flu" ever safe?
In ordinary English text, does "file" or "flu" show up more?
Useful next steps
Eye-level mix-up between "file" and "flu" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "file" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "flu" - compare definitions side by side with the headword page. Word entry
- This pair ranks #497,640 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "file" and "flu" also get mixed up with nearby pairs, the highest-scored neighbour is "flu 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 #497,640 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.