Which to use
“filter” and “folder” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #4,449
- “filter” frequency rank
- #10,548
- “folder” frequency rank
- 14997
- confusion score
Side-by-Side Comparison
| Feature | filter | folder |
|---|---|---|
| Definition | A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another. | An organizer that papers are kept in, usually with an index tab, to be stored as a single unit in a filing cabinet. |
Where the eye mixes filter and folder
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Why the eye confuses filter with folder
A purely visual mix-up. filter (/ˈfɪltə/) and folder (/ˈfoʊɫdɚ/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 14997, derived from the frequency rank of both members and their visual similarity.
filter is recorded at frequency rank #4,449, classified as anoun, pronounced /ˈfɪltə/. folder is at rank #10,548, tagged as anoun, pronounced /ˈfoʊɫdɚ/.
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 14997, this pair ranks #466,663 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of filter vs folder
Shared letters: eflr. Private to "filter": it. Private to "folder": do.
"filter" · 6 letters · shape CVCCVC · "folder" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Do "filter" and "folder" mean the same thing in a sentence?
In ordinary English text, does "filter" or "folder" show up more?
After this comparison
Eye-level mix-up between "filter" and "folder" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "filter" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "folder" - compare definitions side by side with the headword page. Word entry
- This pair ranks #466,663 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "filter" and "folder" also get mixed up with nearby pairs, the highest-scored neighbour is "fader vs folder". 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 #466,663 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.