Which to use
“fatter” is an adjective and “filter” is a noun - they look or sound alike but fill different roles in a sentence.
- #26,786
- “fatter” frequency rank
- #4,449
- “filter” frequency rank
- 31235
- confusion score
Side-by-Side Comparison
| Feature | fatter | filter |
|---|---|---|
| Definition | comparative form of fat: more fat | 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. |
Where the eye mixes fatter and filter
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Look-alike desk: fatter vs filter
These two trip readers on the page rather than in the ear: fatter is /ˈfæːɾɚ/ while filter is /ˈfɪltə/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 31235, derived from the frequency rank of both members and their visual similarity.
fatter is recorded at frequency rank #26,786, classified as anadj, pronounced /ˈfæːɾɚ/. filter is at rank #4,449, tagged as anoun, pronounced /ˈfɪltə/.
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 31235, this pair ranks #347,870 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fatter vs filter
Shared letters: efrt. Private to "fatter": a. Private to "filter": il.
"fatter" · 6 letters · shape CVCCVC · "filter" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "fatter" for "filter" ever safe?
Frequency check: "fatter" vs "filter" - which ranks higher?
After this comparison
Eye-level mix-up between "fatter" and "filter" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "fatter" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "filter" - compare definitions side by side with the headword page. Word entry
- This pair ranks #347,870 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "fatter" and "filter" also get mixed up with nearby pairs, the highest-scored neighbour is "fader vs fatter". 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 #347,870 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.